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 461: In a photo-tropic experiment, young seedlings in a box were subjected to light from one direction. The seedling continue to grow erect. Which of the following statement is correct
Options:
A) Only the tip of the seedling received the light
B) The light was not strong enough
C) The seedlings were rather too young
D) The tip of the seedling may have been covered
E) The box containing the seedling should have been placed on a laboratory bench
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The correct answer is A .
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Question 462: Which of these animals is radially symmetrical?
Options:
A) squid
B) Hydra
C) Snail
D) Cockroach
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The correct answer is B .
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Question 463:
Which of these combinations is common to plant and animal cells?
Options:
A) Centriole, middle lamella, golgi bodies, mitrochondrion
B) Cytoplasm, sap, vacuole, starch grains, leucoplasts
C) Plasma membranes, chromosomes, mitochondria, lysosomes.
D) Nucleus, nucleolus, cellulose cell wall, endoplasmic reticulum
E) Cytoplasm, centriole, cellulose cell wall, nucleolus
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The correct answer is C .
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Question 464: which part of the human brain is concerned with reflexes controlling the rate of heart beat and breathing?
Options:
A) Medulla
B) Cerebrum
C) Cerebellum
D) Pineal body
E) Olfactory lobe
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The correct answer is A .
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Question 465: Sample of different soil types are packed in glass tubes whose lower ends are plugged with cotton wool, if these tubes are suspended in a trough of water, water will rise highest after a few hours in
Options:
A) sand
B) loamy
C) clay
D) humus
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The correct answer is A .
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Question 466:
The cytoplasm of a cell is considered a very important component because it
Options:
A) regulates the amount of energy in the cell
B) suspends all cell organelles
C) is the outermost part of the cell
D) is solely responsible for cell division
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The correct answer is B .
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Question 467: The gland that releases hormones into the blood are part of the
Options:
A) digestive system
B) endocrine system
C) circulatory system
D) respiratory system
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The correct answer is B .
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Question 468: In which of the following tissue do the cells have the ability to divide?
Options:
A) Meristem
B) Sclerenchyma
C) Phloem
D) Collenchyma
E) Pith
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The correct answer is A .
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Question 469: In snails, the hard calcareous shells are secreted by the
Options:
A) radula
B) ctenidium
C) pneumostome
D) mantle
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The correct answer is D .
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Question 470: A plant parenchyma cell also acts as a supporting tissue when it
Options:
A) becomes flaccid
B) contains crystals
C) becomes turgid
D) is pigmented
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The correct answer is C .