Question

1. What are the two types of nutrition shown by living organisms?
2. Why are green plants called autotrophs?
3. Define photosynthesis.
4. Write the word equation of photosynthesis.
5. What is the role played by chlorophyll in the process of photosynthesis?
6. Define the following terms giving examples for each:
(a) Saprophytes (b) Parasites (c) Symbionts (d) Herbivore (e) Carnivore (f) Omnivore
7. What is holozoic nutrition? Name its steps.
8. Give reasons for the following:
(a) Mistletoe is a partial parasite.
(b) Carnivorous plants trap insects.
(c) Rice and Roti taste sweet after being chewed in mouth.
(d) Digestion of fat becomes difficult if gall bladder is removed.
(e) Inner wall of small intestine is thrown into finger like villi.
9. State the functions of different parts of the alimentary canal:
(a) Tongue (b) Teeth (c) Large intestine
10. Name the secretions of the following glands and give their significance in digestion:
(a) Glands of Stomach (b) Liver (c) Pancreas
11. Differentiate between:
(a) Mastication and Peristalsis
(b) Milk teeth and Permanent teeth
12. Draw and label the human digestive system.

Answer 1

Answer:

Q1. Types of living organisms are- Autotrophs and Heterotrophs.

Q2. Green plants are called autotrophs becoz they can synthesise their own food using chlorophyll.

Q3. Process by which plants make their own food by converting light energy to chemical energy.

Q4. Carbon-dioxide + Water = Glucose + Energy

Q5. Chlorophyll traps light energy so that it can be converted to chemiocal energy.

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