Biology is the study of life and living things. It can be divided into different areas that look at the structure, function, anatomy, and behavior of organisms.
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Question 161: Which of the following has the greatest influence on the distribution of animals in marine and fresh water habitats?
Options:
A) pH
B) Salinity
C) Water current
D) Turbidity
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The correct answer is A .
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Question 162: In a dicot leaf, guard cells differ from other epidermal cells because they
Options:
A) have no definite shape
B) lack nuclei
C) are smaller
D) contain chloroplast
E) lack vacuole
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The correct answer is D .
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Question 163:
Which of the following is the effect of using artificial pollination in plant breeding?
Options:
A) Production of healthy crops
B) Lengthening the maturity time of crops
C) Making crops susceptible to disease
D) Improvement of the variety of crops
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The correct answer is D .
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Question 164: Underground stems which grow horizontally through the soil are
Options:
A) Bulbs
B) Rhizomes
C) Runners
D) Corms
E) Stolons
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The correct answer is B .
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Question 165: A non - renewable alternative source of energy is
Options:
A) wind generator
B) solar panels
C) nuclear energy
D) hydroelectric power
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The correct answer is C .
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Question 166: Some of the major elements required by plants are
Options:
A) Potassium, nitrogen, phosphorus, sodium, calcium
B) Nitrogen, phosphorus, molybdenum, sodium, calcium
C) Potassium, phosphorus, molybdenum, sodium, calcium
D) Potassium, nitrogen, iron , sodium, calcium
E) Potassium, nitrogen, phosphorus, silicon, cadmium
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The correct answer is A .
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Question 167: Heat produced in tissue respiration in plants is
Options:
A) a chemical form of energy
B) the only form of energy
C) the main form of energy
D) a useful form of energy
E) a waste form of energy
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The correct answer is A .
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Question 168:
The temporary union of two organisms and the exchange of micronuclear elements is called
Options:
A) Conjugation
B) Binary fusion
C) Extrapolation
D) Interexchange
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The correct answer is A .
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Question 169:
The type of nutrition shown by spirogyra is
Options:
A) Symbiosis
B) Holozoic
C) Chemosynthetic
D) Holophytic
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The correct answer is D .
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Question 170: The greatest amount of energy will be obtained by the oxidation of 100kg of
Options:
A) meat
B) butter
C) sugar
D) biscuits
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The correct answer is B .