Question

pination
1. In respiration, oxygen is taken in and carbon dioxide is given out.
2. Diffusion of gases takes place through a small part of the root surface.
3. In anaerobic respiration, complete breakdown of food takes place.
4. Earthworms absorb oxygen through their moist skin.
7. In plants, respiration occurs only at night.
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III. Write true or false against the statements given below:
5. Frogs breathe through their skin as well as their lungs.
6. The fishes use lungs for respiration.​

Answer 1

Answer:

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Answer 2

Answer:

1: Carbon dioxide is the waste product of cellular respiration that you breathe out each time you breathe. Blood picks up oxygen and releases carbon dioxide in the lungs. The opposite takes place in the cells where the blood releases oxygen and picks up carbon dioxide.

2:Oxygen from the air in soil particles diffuse into root hair and reach all the cells of the root where it is utilised in respiration. Carbon dioxide produced in the cells of the root during respiration goes out through the same root hair by the process of diffusion

3:When the breakdown of glucose (food) occurs without the use of oxygen, it is called anaerobic respiration. ... In anaerobic respiration, the micro-organisms like yeast break down glucose (food) in the absence of oxygen to form alcohol and carbon dioxide, and release energy.

4:Diffusion allows an earthworm to get the oxygen it needs to survive. ... A moist surface is necessary for oxygen to be absorbed and carbon dioxide to be given off. The worm's skin is protected by a thin cuticle and kept moist by a slimy mucus. This lets it absorb the oxygen it needs and expel carbon dioxide.

5:Although frogs have lungs, they perform much of their respiration through their skin, bypassing their lungs completely. Their moist skin is specially designed with tiny blood vessels near the surface to help diffuse oxygen in and carbon dioxide out, even when the frogs are hibernating or underwater.

6:The name lungfish is thus well applied: these fishes have lungs that are derived from the swim bladder (an organ used for buoyancy in most bony fishes), which is connected to the alimentary tract. ... At such times the fish rises less often to the surface to breathe atmospheric air.

7:Plants respire all the time, day and night. But photosynthesis only occurs during the day when there is sunlight. Depending on the amount of sunlight, plants can give out or take in oxygen and carbon dioxide as follows1. Dark – Only respiration takes place.