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 221: The oily substance that lubricates the mammalian hair to keep it flexible and water repellent is secreted by the
Options:
A) sweet glands
B) sebaceous glands
C) fatty cells
D) granular layer
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The correct answer is B .
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Question 222:
Which of the following structures in the ear is responsible for transmitting sound vibrations to the auditory nerve?
Options:
A) Eardrum
B) Ossicles
C) Cochlea
D) Auditory canal
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The correct answer is C .
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Question 223: Which of the following ions is involved in the conduction of the nerve impulse?
Options:
A) Ca2+
B) K+
C) H+
D) Mg2+
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The correct answer is B .
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Question 224: Nitrogen- fixing micro-organisms in leguminous plants live symbiotically in the
Options:
A) root nodules
B) tap root
C) branch roots
D) root hairs
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The correct answer is A .
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Question 225:
Which part of the curve represents the fastest rate of growth?
Options:
A) K
B) L
C) M
D) N
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The correct answer is C .
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Question 226: Oozing out of water from the leaves of plants in a humid environment is known as
Options:
A) transpiration
B) osmosis
C) pinocytosis
D) guttation
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The correct answer is D .
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Question 227:
Mass of a crucible = 10g,
Mass of a crucible and soil before heating =29g
Mass of a crucible and soil after heating = 18g
From the information above, determine the percentage of water in the given soil sample?
Options:
A) 20%
B) 25%
C) 40%
D) 60%
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The correct answer is D .
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Question 228:
The process of pollination involves the transfer of pollens from
Options:
A) II to III
B) IV to I
C) I to II
D) III to IV
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The correct answer is A .
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Question 229:
The experimental set-up can be used to demonstrate that
Options:
A) light is necessary for photosynthesis
B) oxygen is necessary for photosynthesis
C) photosynthesis occurs in the leaves of plants
D) carbon (IV) oxide is necessary for photosynthesis
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The correct answer is D .
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Question 230: Which of these products obtained from analyzing sweat from skin is not an excretory product?
Options:
A) water
B) Salts
C) Dust
D) Urea
E) Urates
Show Answer
The correct answer is C .