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 581: The importance of practising crop rotation in agriculture is to
Options:
A) maintain soil fertility
B) improve the nutritional value of crops
C) control soil erosion
D) ensure the growth of crops
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The correct answer is A .
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Question 582:
The lime water in container B turned milky because
Options:
A) carbon dioxide was produced by plant
B) during respiration carbon dioxide entered C
C) oxygen reacts with lime water to produce milkiness
D) soda lime did not remove carbon dioxide from air
E) the delivery tubes were not well connected
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The correct answer is A .
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Question 583: The mammalian erythrocytes differ from the leucocytes at maturity because the erythrocytes are
Options:
A) discoid and nucleated
B) discoid and enucleated
C) amoeboid and nucleated
D) amoeboid and enucleated
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The correct answer is B .
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Question 584: Which of the following causes pollution?
Options:
A) Consumption of canned drink
B) The addition of fertilizer to farmland
C) Respiration of living organism
D) Burning of refuse
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The correct answer is D .
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Question 585: The elephant grass is propagated vegetatively by means of
Options:
A) corms
B) bubils
C) suckers
D) stolons
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The correct answer is D .
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Question 586:
In which of the habitats will plants show xeromorphic features most prominently?
Options:
A) X
B) R
C) P
D) Q
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The correct answer is A .
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Question 587:
An adaptation for defense in animals is?
Options:
A) croaking of a male toad
B) basking in lizard
C) spines in porcupine fish
D) huddling together of penguins
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The correct answer is C .
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Question 588:
Which part of the twig produces auxins?
Options:
A) 4
B) 3
C) 2
D) 1
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The correct answer is D .
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Question 589:
Which of the following processes removes carbon from the atmosphere?
Options:
A) putrefaction
B) photosynthesis
C) volcanic eruption
D) burning of fuels
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The correct answer is B .
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Question 590:
People who suck petrol with their mouths run the risk of increasing in their blood the concentration of
Options:
A) iron
B) lead
C) calcium
D) magnesium
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The correct answer is B .