Passage Questions (56 to 60): Read the following passages and answer the questions given below:
Water scarcity is fast becoming one of the major limiting factors in the world crop production. In many areas, poor agricultural practices have led to increasing desertification and the loss of formerly arable lands. Consequently, those plants species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.
Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant’s surface, smaller leaf size and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums and mucilages which give them water-retaining properties. Another chemical mechanism is that of the epicuticularwexlayer. This wax layer acts as an impervious cover to protect the plant. It prevents excessive loss of internal moisture. It also protects the plant from (external aggression, which can come inorganic agents such as gases, or organic agents which include bacteria and plant pests.
Researchers have proposed that synthetic waxes with similar protective abilities could be prepared based on knowledge of desert lands. If successfully developed, such a compound could be used to greatly increase a plant’s ability to maintain health in such adverse situations as inadequate water supply. Limited fertilizer ability, attack by pests and poor storage after harvesting.
(Q-58): Which is one of the ways in which the epicuticular wax projects the plant?
Passage Questions (56 to 60): Read the following passages and answer the questions given below:
Water scarcity is fast becoming one of the major limiting factors in the world crop production. In many areas, poor agricultural practices have led to increasing desertification and the loss of formerly arable lands. Consequently, those plants species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.
Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant’s surface, smaller leaf size and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums and mucilages which give them water-retaining properties. Another chemical mechanism is that of the epicuticularwexlayer. This wax layer acts as an impervious cover to protect the plant. It prevents excessive loss of internal moisture. It also protects the plant from (external aggression, which can come inorganic agents such as gases, or organic agents which include bacteria and plant pests.
Researchers have proposed that synthetic waxes with similar protective abilities could be prepared based on knowledge of desert lands. If successfully developed, such a compound could be used to greatly increase a plant’s ability to maintain health in such adverse situations as inadequate water supply. Limited fertilizer ability, attack by pests and poor storage after harvesting.
(Q-58): Which is one of the ways in which the epicuticular wax projects the plant?
The most ancient historical place of Bangladesh is
The most ancient historical place of Bangladesh is
Insert the missing number.
Insert the missing number.
Which comes next?
Which comes next?
তিনটি বছর- এখানে তিনটি কোন শব্দ?
তিনটি বছর- এখানে তিনটি কোন শব্দ?
Antonym:
parallelism
Antonym:
parallelism
নির্বন্ধ ও প্রথিত শব্দদ্বয়ের অর্থ যথাক্রমে-
নির্বন্ধ ও প্রথিত শব্দদ্বয়ের অর্থ যথাক্রমে-
Passage Questions (56 to 60): Read the following passages and answer the questions given below:
Water scarcity is fast becoming one of the major limiting factors in the world crop production. In many areas, poor agricultural practices have led to increasing desertification and the loss of formerly arable lands. Consequently, those plants species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.
Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant’s surface, smaller leaf size and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums and mucilages which give them water-retaining properties. Another chemical mechanism is that of the epicuticularwexlayer. This wax layer acts as an impervious cover to protect the plant. It prevents excessive loss of internal moisture. It also protects the plant from (external aggression, which can come inorganic agents such as gases, or organic agents which include bacteria and plant pests.
Researchers have proposed that synthetic waxes with similar protective abilities could be prepared based on knowledge of desert lands. If successfully developed, such a compound could be used to greatly increase a plant’s ability to maintain health in such adverse situations as inadequate water supply. Limited fertilizer ability, attack by pests and poor storage after harvesting.
(Q-59): What is an example of an inorganic agent that may attack plants?
Passage Questions (56 to 60): Read the following passages and answer the questions given below:
Water scarcity is fast becoming one of the major limiting factors in the world crop production. In many areas, poor agricultural practices have led to increasing desertification and the loss of formerly arable lands. Consequently, those plants species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.
Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant’s surface, smaller leaf size and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums and mucilages which give them water-retaining properties. Another chemical mechanism is that of the epicuticularwexlayer. This wax layer acts as an impervious cover to protect the plant. It prevents excessive loss of internal moisture. It also protects the plant from (external aggression, which can come inorganic agents such as gases, or organic agents which include bacteria and plant pests.
Researchers have proposed that synthetic waxes with similar protective abilities could be prepared based on knowledge of desert lands. If successfully developed, such a compound could be used to greatly increase a plant’s ability to maintain health in such adverse situations as inadequate water supply. Limited fertilizer ability, attack by pests and poor storage after harvesting.
(Q-59): What is an example of an inorganic agent that may attack plants?
Practicing : Expertise
Practicing : Expertise
The great scientist ………himself with ability and moderation all…………..the conference.
The great scientist ………himself with ability and moderation all…………..the conference.
Find the probabilities of selecting a prime number from a set of numbers 1 to 15 ( both inclusive)
Find the probabilities of selecting a prime number from a set of numbers 1 to 15 ( both inclusive)
কোনটি ‘কন্যা’ শব্দের অর্থ নয়?
কোনটি ‘কন্যা’ শব্দের অর্থ নয়?
Today the number of people which enjoy winter sports is almost double that of twenty years ago. No error.
Today the number of people which enjoy winter sports is almost double that of twenty years ago. No error.
At the rate of m meters per s second, how many meters does a cyclist travel in x minutes?
At the rate of m meters per s second, how many meters does a cyclist travel in x minutes?
A certain river has a current of 3 miles per hour. A boat takes twice as long to travel upstream between two points as it does to travel downstream between the same two points. What is the speed of the boat in still water?
A certain river has a current of 3 miles per hour. A boat takes twice as long to travel upstream between two points as it does to travel downstream between the same two points. What is the speed of the boat in still water?
কোন বাঙ্গালী নাট্যকর বাংলা নাটকের পথিকৃৎ?
কোন বাঙ্গালী নাট্যকর বাংলা নাটকের পথিকৃৎ?
‘দহন’ শব্দের বিশেষন কোনটি?
‘দহন’ শব্দের বিশেষন কোনটি?
The capital city and the currency of Poland are respectively
The capital city and the currency of Poland are respectively
Passage Questions (56 to 60): Read the following passages and answer the questions given below:
Water scarcity is fast becoming one of the major limiting factors in the world crop production. In many areas, poor agricultural practices have led to increasing desertification and the loss of formerly arable lands. Consequently, those plants species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.
Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant’s surface, smaller leaf size and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums and mucilages which give them water-retaining properties. Another chemical mechanism is that of the epicuticularwexlayer. This wax layer acts as an impervious cover to protect the plant. It prevents excessive loss of internal moisture. It also protects the plant from (external aggression, which can come inorganic agents such as gases, or organic agents which include bacteria and plant pests.
Researchers have proposed that synthetic waxes with similar protective abilities could be prepared based on knowledge of desert lands. If successfully developed, such a compound could be used to greatly increase a plant’s ability to maintain health in such adverse situations as inadequate water supply. Limited fertilizer ability, attack by pests and poor storage after harvesting.
(Q-60): All of the following are examples of an adverse situation for crops except
Passage Questions (56 to 60): Read the following passages and answer the questions given below:
Water scarcity is fast becoming one of the major limiting factors in the world crop production. In many areas, poor agricultural practices have led to increasing desertification and the loss of formerly arable lands. Consequently, those plants species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.
Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant’s surface, smaller leaf size and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums and mucilages which give them water-retaining properties. Another chemical mechanism is that of the epicuticularwexlayer. This wax layer acts as an impervious cover to protect the plant. It prevents excessive loss of internal moisture. It also protects the plant from (external aggression, which can come inorganic agents such as gases, or organic agents which include bacteria and plant pests.
Researchers have proposed that synthetic waxes with similar protective abilities could be prepared based on knowledge of desert lands. If successfully developed, such a compound could be used to greatly increase a plant’s ability to maintain health in such adverse situations as inadequate water supply. Limited fertilizer ability, attack by pests and poor storage after harvesting.
(Q-60): All of the following are examples of an adverse situation for crops except
The present ratio of students to teacher at a certain school is 30 to 1. If the student enrollment were to increase by 50 students and the number of teachers were to increase by 5, the ratio of students to teachers would then be 25 to 1. What is the present number of teachers?
The present ratio of students to teacher at a certain school is 30 to 1. If the student enrollment were to increase by 50 students and the number of teachers were to increase by 5, the ratio of students to teachers would then be 25 to 1. What is the present number of teachers?
‘চারু’ ও ‘অমল’ চরিত্রদ্বয় রবীন্দ্রনাথ ঠাকুরের কোন ছোট গল্পের চরিত্র?
‘চারু’ ও ‘অমল’ চরিত্রদ্বয় রবীন্দ্রনাথ ঠাকুরের কোন ছোট গল্পের চরিত্র?
Questions: 67 to 70: Refer to the following information:
A group of three objects must be selected from 6 objects, K, O, S, T, V and W according to the following conditions
Q(67-60):
A group of three objects must be selected from six objects K, O, S, T, V, and W according to the following conditions:
Either K or S, or both, must be selected
Either O or V must be selected, but neither V nor S can be selected with O.
(Q-67): Which of the following is an acceptable selection of objects?
Questions: 67 to 70: Refer to the following information:
A group of three objects must be selected from 6 objects, K, O, S, T, V and W according to the following conditions
Q(67-60):
A group of three objects must be selected from six objects K, O, S, T, V, and W according to the following conditions:
Either K or S, or both, must be selected
Either O or V must be selected, but neither V nor S can be selected with O.
(Q-67): Which of the following is an acceptable selection of objects?
Copper is a metal which is easily worked and which mixes will with other metals to form alloys. No error.
Copper is a metal which is easily worked and which mixes will with other metals to form alloys. No error.
What is the area of the equilateral triangle if the base BC=6?
What is the area of the equilateral triangle if the base BC=6?
Ostrich : Bird
Ostrich : Bird
Ozone depletion is caused by
Ozone depletion is caused by
‘তুমি আসবে বলে হে সাধীনতা’ কার রচনা?
‘তুমি আসবে বলে হে সাধীনতা’ কার রচনা?
কোন বানানটি শুদ্ধ?
কোন বানানটি শুদ্ধ?
লোকসাহিত্য কাকে বলে?
লোকসাহিত্য কাকে বলে?
If it had not been for the computerized register tape from the grocery store, I never would have been able to figure on my expenditure. No error.
If it had not been for the computerized register tape from the grocery store, I never would have been able to figure on my expenditure. No error.
কোনটি শুদ্ধ?
কোনটি শুদ্ধ?
If two non-zero positive integers p and q are such that p=4q and p<8, then q=?
If two non-zero positive integers p and q are such that p=4q and p<8, then q=?
ভাষা আন্দোলনের ফলে কোন প্রতিষ্ঠান সৃষ্ঠি হয়েছিল?
ভাষা আন্দোলনের ফলে কোন প্রতিষ্ঠান সৃষ্ঠি হয়েছিল?
Being that he was a good swimmer, Mir jumped into the water and rescued the drowning child. No error.
Being that he was a good swimmer, Mir jumped into the water and rescued the drowning child. No error.
In a word ………….by men for so many years, women are only thought………….for jobs like typists, receptionists and teachers.
In a word ………….by men for so many years, women are only thought………….for jobs like typists, receptionists and teachers.
In the figure, what is the value of a?
In the figure, what is the value of a?
Questions: 67 to 70: Refer to the following information:
A group of three objects must be selected from 6 objects, K, O, S, T, V and W according to the following conditions:
Either K or S, or both, must be selected
Either O or V must be selected, but neither V nor S can be selected with O.
(Q-70): If V is not selected, which pair of objects must be among those selected?
Questions: 67 to 70: Refer to the following information:
A group of three objects must be selected from 6 objects, K, O, S, T, V and W according to the following conditions:
Either K or S, or both, must be selected
Either O or V must be selected, but neither V nor S can be selected with O.
(Q-70): If V is not selected, which pair of objects must be among those selected?
Laboni bought a 1-years, tk. 10,000 certificate of deposit that paid interest at an annual rate of 8 percent compounded semiannually. What was the total amount of interest paid on this certificate maturity?
Laboni bought a 1-years, tk. 10,000 certificate of deposit that paid interest at an annual rate of 8 percent compounded semiannually. What was the total amount of interest paid on this certificate maturity?
সুন্দর মাত্রেরই একটা আকর্ষন শক্তি আছে- এই বাক্যে সুন্দর শব্দটি কোন পদ?
সুন্দর মাত্রেরই একটা আকর্ষন শক্তি আছে- এই বাক্যে সুন্দর শব্দটি কোন পদ?
Questions: 67 to 70: Refer to the following information:
A group of three objects must be selected from 6 objects, K, O, S, T, V and W according to the following conditions:
Either K or S, or both, must be selected
Either O or V must be selected, but neither V nor S can be selected with O.
(Q-68): Which of the following pairs of objects cannot both be among the objects selected?
Questions: 67 to 70: Refer to the following information:
A group of three objects must be selected from 6 objects, K, O, S, T, V and W according to the following conditions:
Either K or S, or both, must be selected
Either O or V must be selected, but neither V nor S can be selected with O.
(Q-68): Which of the following pairs of objects cannot both be among the objects selected?
‘যদি হউ সুজন, তেঁতুল পাতায় ন জন’- প্রবচনটির অর্থ কি?
‘যদি হউ সুজন, তেঁতুল পাতায় ন জন’- প্রবচনটির অর্থ কি?
Forgery : Counterfeit
Forgery : Counterfeit
Anne Frank wrote her world-famous diary the Second World hiding in
Anne Frank wrote her world-famous diary the Second World hiding in
A Biologist specializing in the study of insects is called
A Biologist specializing in the study of insects is called
উন্নীত শব্দের বিপরীতার্থক শব্দ কি?
উন্নীত শব্দের বিপরীতার্থক শব্দ কি?
Questions :64 to 66: Refer to the following information and chart:
Family A has an annual income of tk. 2,00,000. Family B has an annual income of tk. 5,00,000. Family C has an annual income of tk. 10,00,000. The following data gives the break-up of expenditures of A, B, and C in percentage terms.
(Q-65): What is the average monthly expenditure of family A on food?
Questions :64 to 66: Refer to the following information and chart:
Family A has an annual income of tk. 2,00,000. Family B has an annual income of tk. 5,00,000. Family C has an annual income of tk. 10,00,000. The following data gives the break-up of expenditures of A, B, and C in percentage terms.
(Q-65): What is the average monthly expenditure of family A on food?
‘ধর্মের কল বাতাসে নড়ে’ অর্থ বৈশিষ্টের দিক থেকে কোন ধরনের প্রবাদ?
‘ধর্মের কল বাতাসে নড়ে’ অর্থ বৈশিষ্টের দিক থেকে কোন ধরনের প্রবাদ?
Questions :64 to 66: Refer to the following information and chart:
Family A has an annual income of tk. 2,00,000. Family B has an annual income of tk. 5,00,000. Family C has an annual income of tk. 10,00,000. The following data gives the break-up of expenditures of A, B, and C in percentage terms.
(Q-66): If the annual expenditure of family A on health is x and that of family B is y. Then which of the following relations is true?
Questions :64 to 66: Refer to the following information and chart:
Family A has an annual income of tk. 2,00,000. Family B has an annual income of tk. 5,00,000. Family C has an annual income of tk. 10,00,000. The following data gives the break-up of expenditures of A, B, and C in percentage terms.
(Q-66): If the annual expenditure of family A on health is x and that of family B is y. Then which of the following relations is true?
Passage Questions (56 to 60): Read the following passages and answer the questions given below:
Water scarcity is fast becoming one of the major limiting factors in the world crop production. In many areas, poor agricultural practices have led to increasing desertification and the loss of formerly arable lands. Consequently, those plants species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.
Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant’s surface, smaller leaf size and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums and mucilages which give them water-retaining properties. Another chemical mechanism is that of the epicuticularwexlayer. This wax layer acts as an impervious cover to protect the plant. It prevents excessive loss of internal moisture. It also protects the plant from (external aggression, which can come inorganic agents such as gases, or organic agents which include bacteria and plant pests.
Researchers have proposed that synthetic waxes with similar protective abilities could be prepared based on knowledge of desert lands. If successfully developed, such a compound could be used to greatly increase a plant’s ability to maintain health in such adverse situations as inadequate water supply. Limited fertilizer ability, attack by pests and poor storage after harvesting.
(Q-56): This passage deals mainly with
Passage Questions (56 to 60): Read the following passages and answer the questions given below:
Water scarcity is fast becoming one of the major limiting factors in the world crop production. In many areas, poor agricultural practices have led to increasing desertification and the loss of formerly arable lands. Consequently, those plants species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.
Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant’s surface, smaller leaf size and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums and mucilages which give them water-retaining properties. Another chemical mechanism is that of the epicuticularwexlayer. This wax layer acts as an impervious cover to protect the plant. It prevents excessive loss of internal moisture. It also protects the plant from (external aggression, which can come inorganic agents such as gases, or organic agents which include bacteria and plant pests.
Researchers have proposed that synthetic waxes with similar protective abilities could be prepared based on knowledge of desert lands. If successfully developed, such a compound could be used to greatly increase a plant’s ability to maintain health in such adverse situations as inadequate water supply. Limited fertilizer ability, attack by pests and poor storage after harvesting.
(Q-56): This passage deals mainly with
কোনটি হযরত মোহাম্মদ (স:) এর জীবনগ্রন্থ?
কোনটি হযরত মোহাম্মদ (স:) এর জীবনগ্রন্থ?
What is ‘Super 301’?
What is ‘Super 301’?
Antonym:
Endorse
Antonym:
Endorse
Which of the following describes all values of x for which 1-x2≥0?
Which of the following describes all values of x for which 1-x2≥0?
If Ram lives on the first floor, then Sham lives on the second. Sham does live on the second floor. Therefore
If Ram lives on the first floor, then Sham lives on the second. Sham does live on the second floor. Therefore
‘Greenback’ is the popular name of which country’s currency?
‘Greenback’ is the popular name of which country’s currency?
How many times Rafael Nadal has won the ‘French open’ in tennis?
How many times Rafael Nadal has won the ‘French open’ in tennis?
আইন-ই-আকবরী কার লেখা গ্রন্থ?
আইন-ই-আকবরী কার লেখা গ্রন্থ?
Questions :64 to 66: Refer to the following information and chart:
Family A has an annual income of tk. 2,00,000. Family B has an annual income of tk. 5,00,000. Family C has an annual income of tk. 10,00,000. The following data gives the break-up of expenditures of A, B, and C in percentage terms.
(Q-64): What percentage of family C’s income was spend on housing and entertainment?
Questions :64 to 66: Refer to the following information and chart:
Family A has an annual income of tk. 2,00,000. Family B has an annual income of tk. 5,00,000. Family C has an annual income of tk. 10,00,000. The following data gives the break-up of expenditures of A, B, and C in percentage terms.
(Q-64): What percentage of family C’s income was spend on housing and entertainment?
Identify the odd one.
Identify the odd one.
If the volume of a cube is 27 cubic meters, find the surface area of the cube.
If the volume of a cube is 27 cubic meters, find the surface area of the cube.
Underscore: Emphasis
Underscore: Emphasis
Questions: 67 to 70: Refer to the following information:
A group of three objects must be selected from 6 objects, K, O, S, T, V and W according to the following conditions:
Either K or S, or both, must be selected
Either O or V must be selected, but neither V nor S can be selected with O.
(Q-69): If S is selected, which of the following must also be among the objects selected?
Questions: 67 to 70: Refer to the following information:
A group of three objects must be selected from 6 objects, K, O, S, T, V and W according to the following conditions:
Either K or S, or both, must be selected
Either O or V must be selected, but neither V nor S can be selected with O.
(Q-69): If S is selected, which of the following must also be among the objects selected?
ইচ্ছা শব্দের বিশেষন নির্দেশ কর-
ইচ্ছা শব্দের বিশেষন নির্দেশ কর-
It is ……………for every tax payer to…………...the tax return to the income tax department.
It is ……………for every tax payer to…………...the tax return to the income tax department.
The Headquarter of united nations conference on trade and development (UNCTAD) is located at which of the following places?
The Headquarter of united nations conference on trade and development (UNCTAD) is located at which of the following places?
Antonym:
Ruthless
Antonym:
Ruthless
কোন প্রবচনটি উভয়কূল রক্ষা অর্থে ব্যবহৃত?
কোন প্রবচনটি উভয়কূল রক্ষা অর্থে ব্যবহৃত?
‘দেওয়ানা মদিনা’ কোন কাব্যের অন্তর্গত?
‘দেওয়ানা মদিনা’ কোন কাব্যের অন্তর্গত?
The cost, in taka, of manufacturing x microwaves is 6000+300x taka. The amount received when selling these x microwaves is 700x taka. What is the least number of microwaves that must be manufactured and sold so that the net profit is tk.2,400?
The cost, in taka, of manufacturing x microwaves is 6000+300x taka. The amount received when selling these x microwaves is 700x taka. What is the least number of microwaves that must be manufactured and sold so that the net profit is tk.2,400?
Which of the following is world’s top retailer?
Which of the following is world’s top retailer?
The larger of two numbers exceeds twice the smaller number by 9. The sum of twice the larger and 5 times the smaller number is 74. If a is the smaller number, which equation below determines the correct value of a?
The larger of two numbers exceeds twice the smaller number by 9. The sum of twice the larger and 5 times the smaller number is 74. If a is the smaller number, which equation below determines the correct value of a?
Of 30 applicants for a job, 14 had at least 4 years experience. 18 had degrees, 3 had less than 4 years experience and did not have a degree. How many of the applicants had at least 4 years experience and a degree?
Of 30 applicants for a job, 14 had at least 4 years experience. 18 had degrees, 3 had less than 4 years experience and did not have a degree. How many of the applicants had at least 4 years experience and a degree?
Which set of numbers is like the given set │48, 24, 12│?
Which set of numbers is like the given set │48, 24, 12│?
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The………..words of the mother comforted the ……………child
The………..words of the mother comforted the ……………child
Passage Questions (56 to 60): Read the following passages and answer the questions given below:
Water scarcity is fast becoming one of the major limiting factors in the world crop production. In many areas, poor agricultural practices have led to increasing desertification and the loss of formerly arable lands. Consequently, those plants species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.
Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant’s surface, smaller leaf size and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums and mucilages which give them water-retaining properties. Another chemical mechanism is that of the epicuticularwexlayer. This wax layer acts as an impervious cover to protect the plant. It prevents excessive loss of internal moisture. It also protects the plant from (external aggression, which can come inorganic agents such as gases, or organic agents which include bacteria and plant pests.
Researchers have proposed that synthetic waxes with similar protective abilities could be prepared based on knowledge of desert lands. If successfully developed, such a compound could be used to greatly increase a plant’s ability to maintain health in such adverse situations as inadequate water supply. Limited fertilizer ability, attack by pests and poor storage after harvesting.
(Q-57): Which of the following is a mechanical or physical that desert plants use?
Passage Questions (56 to 60): Read the following passages and answer the questions given below:
Water scarcity is fast becoming one of the major limiting factors in the world crop production. In many areas, poor agricultural practices have led to increasing desertification and the loss of formerly arable lands. Consequently, those plants species that are well adapted to survival in dry climates are being looked at for an answer in developing more efficient crops to grow on marginally arable lands.
Plants use several mechanisms to ensure their survival in desert environments. Some involve purely mechanical and physical adaptations, such as the shape of the plant’s surface, smaller leaf size and extensive root systems. Some of the adaptations are related to chemical mechanisms. Many plants, such as cacti, have internal gums and mucilages which give them water-retaining properties. Another chemical mechanism is that of the epicuticularwexlayer. This wax layer acts as an impervious cover to protect the plant. It prevents excessive loss of internal moisture. It also protects the plant from (external aggression, which can come inorganic agents such as gases, or organic agents which include bacteria and plant pests.
Researchers have proposed that synthetic waxes with similar protective abilities could be prepared based on knowledge of desert lands. If successfully developed, such a compound could be used to greatly increase a plant’s ability to maintain health in such adverse situations as inadequate water supply. Limited fertilizer ability, attack by pests and poor storage after harvesting.
(Q-57): Which of the following is a mechanical or physical that desert plants use?
