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 511: One of the following diseases is caused by fungi
Options:
A) cassava mosaic
B) coffee leaf rust
C) leaf blight of cassava rossette
D) disease of groundnut
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The correct answer is B .
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Question 512: Which of these is not an enzyme?
Options:
A) Pepsin
B) Gastrin
C) Amylase
D) Chymotrypsin
E) Trypsin
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The correct answer is B .
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Question 513: A yellow maize is crossed with a white maize and the first filial generation produce yellow maize only. The white trait is said to exhibit
Options:
A) dominance
B) recessiveness
C) codominance
D) incomplete dominance
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The correct answer is B .
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Question 514:
Use the diagram to answer the question.
The process of water loss and intake indicated by the arrows labelled i and ii are respectively
Options:
A) evaporation and osmosis
B) osmosis and exhalation
C) osmosis and diffusion
D) urination and diffusion
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The correct answer is B .
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Question 515: The largest amount of yolk is found in the egg of
Options:
A) amphibians
B) pisces
C) repitles
D) aves
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The correct answer is D .
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Question 516:
In the diagram, The economic importance of the larva is that it
Options:
A) is eaten by birds
B) develop into a moth
C) resembles the plant on which it lives
D) feeds on the leaves of crops
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The correct answer is D .
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Question 517: The possession of scales, laying of eggs with shells and bony structure of the head are characteristics shared by
Options:
A) birds and reptiles
B) fishes and birds
C) reptiles and fishes
D) birds and molluscs
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The correct answer is C .
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Question 518: Wind pollinated flowers usually have
Options:
A) rough pollen grains
B) sticky stigmas
C) small and short stigmas
D) long styles
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The correct answer is D .
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Question 519: Which of the following is likely to have a higher concentration of the mitochondria?
Options:
A) Sperm cell
B) white blood cell
C) Egg cell
D) Red blood cell
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The correct answer is A .
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Question 520: They key event in the transition of the amphibians from water to land is the
Options:
A) replacement of the gills with lungs
B) possession of webbed limbs
C) development of long hing limbs
D) possession of tympanic membrane
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The correct answer is A .