NIOS Class 10 Science and Technology Chapter 22. LIFE PROCESSES-1 NURTRITION, TRANSPORTATION, RESPIRATION AND EXCRETION– Chapter-wise Important Questions and Answers

NIOS Class 10 Science and Technology Chapter 22. LIFE PROCESSES-1 NURTRITION, TRANSPORTATION, RESPIRATION AND EXCRETION | MCQs, Short & Long Answer Questions | 22. LIFE PROCESSES-1 NURTRITION, TRANSPORTATION, RESPIRATION AND EXCRETION

Chapter 22. LIFE PROCESSES-1 NURTRITION, TRANSPORTATION, RESPIRATION AND EXCRETION

INTEXT QUESTIONS 22.1

1. Give two examples of autotrophs. Why do you call them so?

Answer: Examples of autotrophs: green plants and algae.

They are called autotrophs because they manufacture their own food by photosynthesis, using sunlight, carbon dioxide and water.

2. Why are autotrophs termed ‘producers’ of food chain?

Answer: Autotrophs are termed ‘producers’ in a food chain because they prepare food and become the food source for all the organisms in the food chain.

3. Fill in the blanks in the flow chart given below:

Photo

Answer: Types of nutrition:Autotrophic, Heterotrophic:—Holozoic, Parasitic, Saprophytic/ Saprotrophic.

4. The parasitic and saprotrophic modes of nutrition do not need the three processes required by holozoic animals. Which processes are these?

Answer: The three processes required by holozoic animals are ingestion, digestion and egestion.

Parasitic and saprotrophic modes of nutrition do not need these processes because they obtain already prepared food and do not need digestion of ingested food.

5. Classify the following as saprotrophs or parasites: leech, yeast, head louse, mushroom

Answer: The classification are:

Saprotrophs – Yeast, Mushroom

Parasites – Leech, Head louse

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