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Question 154
A
reduce the friction caused by the pumping movements of the heart 
B
supply the heart with organisms from attacking the heart 
C
prevent disease organism from attacking the heart 
D
reduce the intensity of the pumping 
Explanation.
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Correct Option:
A
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Question 156
A
respiring in the absence of oxygen 
B
liberating oxygen on their own 
C
living and consuming oxygen 
D
being killed by the alcohol produced 
Explanation.
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Correct Option:
A
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Question 157
A
osmosis and diffusion 
B
active transport and osmosis 
C
ultrfiltration and selective reabsorption 
D
active transport and cytoplasmic streaming 
Explanation.
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Correct Option:
C
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Question 158
A
respiration and guttation 
B
transpiration and guttation 
C
photosynthesis and guttation 
D
guttation and condensation 
Explanation.
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Correct Option:
B
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