Question

Q1. Why do herbivores have longer, small intestine than carnivores?


Q2. Write the balanced chemical equation for the process of photosynthesis. How

photosynthesis ours in desert plants?


Q3. In single celled organisms diffusion is sufficient to meet all their requirements of

food, exchange of gases or removal of wastes but it is not in case of multicellular

organism. Explain the reason for this difference.


Q4. Draw a labelled diagram of human alimentary canal.


Q5. Explain the process of nutrition in Amoeba.


Q6. How do guard cells regulate the opening and closing of stomata?


Q7. Explain exchange of gases in humans.


Q8. State the role of following in human digestive system:

• Digestive enzymes

• Hydrochloric acid (HCl)

• Villi


Q9. Draw a diagram of human respiratory system and label the following:-

• Part where air is filtered by fine hairs and mucus.

• Part which terminate in balloon like structure.

• Part which separates chest cavity from abdominal cavity.

• Part where exchange of gases takes place.


Q10. Draw a labelled diagram of opened and closed stomata.​

Answer 1

Answer:

1) because they eat plants and in plants have cellulose. cellulose doesn't digest quick so herbivore have longer intestine or a digestive system

Answer 2

Answer:

ans 1 Herbivores consume producers like plants which contain cellulose in the cell wall of their cells. Digestion of cellulose in the gut takes a longer time and hence, the gut of herbivores is longer than gut of carnivores.

ans 2 6CO2 + 6H2O — > C6H12O6 + 6O2.

ans 5 Nutrition in an Amoeba occurs through a process called phagocytosis where the entire organism pretty much engulfs the food it plans on eating up. The mode of nutrition in amoeba is known as holozoic nutrition. It involves the ingestion, digestion and egestion of food material.

The opening and closing of stomata are controlled by the guard cells. When water flows into the guard cells, they swell up and the curved surface causes the stomata to open. When the guard cells lose water, they shrink and become flaccid and straight thus closing the stomata.