Ecosystem

Question 1

Which of the following are primary consumers in a food chain?

Accepted Answer

Herbivores. Primary consumers are those that feed directly on the producers, and that is what herbivores do. Carnivores and predators eat other consumers and so occupy higher trophic levels.

Answer

Parasites

Answer

Predators

Answer

Carnivores

Question 2

Which of the following statements are Correct? Choose the correct answer from the options given below: (a) Energy flow from producers to consumers is unidirectional (b) Energy pyramid can never be inverted (c) Transfer of energy follows the 1% law.

Accepted Answer

(a) and (b) only. Energy enters as sunlight and passes one way up the trophic levels, never back — so (a) holds. The pyramid of energy is always upright because energy is lost as heat at every transfer, so (b) holds too. Statement (c) has the wrong figure: it is the 10 per cent law, not 1 per cent.

Answer

(a), (b) and (c)

Answer

(a) and (c) only

Answer

(b) and (c) only

Question 3

Given below are two statements. In the light of the above statements, choose the most appropriate answer from the options given below. Statement I: The primary source of energy in an ecosystem is solar energy. Statement II: The rate of production of organic matter during photosynthesis in an ecosystem is called net primary productivity (NPP).

Accepted Answer

Statement I is correct but statement II is incorrect. Statement I is correct — sunlight drives virtually every ecosystem through photosynthesis. Statement II misdefines the term. The rate at which producers form organic matter during photosynthesis is GROSS primary productivity. Net primary productivity is what remains after respiratory losses, GPP minus R, and it is the biomass actually available to herbivores.

Answer

Both statement I and statement II are correct

Answer

Both statement I and statement II are incorrect

Answer

Statement I is incorrect but statement II is correct

Q1.Which of the following are primary consumers in a food chain?

Q2.Which of the following statements are Correct? Choose the correct answer from the options given below:

Q3.Given below are two statements. In the light of the above statements, choose the most appropriate answer from the options given below.