Biology
Assertion. Active transport does not occur through a non-living semi-permeable membrane.
Reason. Active transport is in a direction opposite to that of diffusion, i.e., from a region of lower concentration to higher concentration.
- Both A and R are True
- Both A and R are False
- A is True and R is False.
- A is False and R is True.
Roots Absorption
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Answer
Both A and R are True
Explanation
Active transport does not occur through a non-living semi-permeable membrane because it requires energy (ATP) which can only be provided by living membrane.
Active transport moves molecules against their concentration gradient, from an area of lower concentration to an area of higher concentration, which requires energy input.
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Assertion. Diffusion is the process of free movement of liquid molecules only. It does not occur in gaseous state.
Reason. The main condition which regulates the process of diffusion is the concentration gradient and not the state of matter. It always occurs from higher to lower concentration.
- Both A and R are True
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Assertion. Translocation of prepared food material in plants always occurs through the phloem tissue in an upward direction.
Reason. Phloem is a kind of a complex permanent tissue in plants which surrounds the xylem tissue. It is present all throughout the plant-root, stem or leaves.
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Assertion. Lenticels allow diffusion of gases for respiration.
Reason. Lenticels are located on the surface of older woody stems. They close during night time and open during the day for the process of transpiration.
- Both A and R are True
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- A is True and R is False.
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Assertion. Transpiration decreases the amount of moisture in the atmosphere.
Reason. Forests contribute in bringing rain because of transpiration.
- Both A and R are True
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