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 671:
The four classes of cnidarian include the following except
Options:
A) Turbellaria
B) Anthozoa
C) Scyphozoa
D) Cubozoa
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The correct answer is A .
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Question 672:
In the diagram, the male sex cells are contained in the part labelled
Options:
A) i
B) ii
C) iii
D) iv
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The correct answer is B .
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Question 673: Mammals are capable of producing hypertonic urine mainly because of re-absorption in the
Options:
A) Bowmans capsule
B) Urethra
C) Ureter
D) Loop of henle
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The correct answer is D .
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Question 674: Which of the following organs regulates the levels of water. salts, hydrogen ions, and urea in the mammals?
Options:
A) Kidney
B) Colon
C) Bladder
D) Liver
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The correct answer is A .
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Question 675: An individual in the AB blood group is a universal recipient for blood donation because
Options:
A) all the red blood cells do not carry antigen
B) all the red blood cells carry antigen
C) all the red blood cells carry antigen
D) there are no anti-A and anti-B antibodies in the serum
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The correct answer is D .
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Question 676: Production of naked seeds is a distinctive feature of the group of plant called
Options:
A) grasses
B) conifers
C) legumes
D) palms
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The correct answer is B .
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Question 677: A mixture of mercurous and mercuric nitrates is added to a food substance. A white precipitates is formed which on gentle heating turns red. The food substance is
Options:
A) Protein
B) Oil
C) Carbohydrates
D) Fat
E) Fatty acid
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The correct answer is A .
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Question 678:
Farmers practise crop rotation because it
Options:
A) helps to prevent soil erosion
B) allows two crops to be planted at the same time
C) helps to conserve soil fertility
D) is an alternate to shifting cultivation
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The correct answer is C .
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Question 679:
The part labelled II is the
Options:
A) fenestra ovalis
B) middle ear canal
C) internal auditrory meatus
D) ear ossicles
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The correct answer is D .
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Question 680: During thunderstorms the energy of lightning discharge causes
Options:
A) oxygen and nitrogen to combine
B) more carbon dioxide to be formed
C) nitrites to be converted to nitrates
D) nitrates to be converted to nitrogen
E) death
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The correct answer is A .