"How Nature Works in Harmony" — Practice

Question 1

What is the correct order of the hierarchy shown in Fig. 12.7, from smallest to largest?

Accepted Answer

Individual -> Population -> Community -> Ecosystem

Question 2

In Activity 12.3's Pond A/Pond B study, why did Pond A (with fish) have fewer dragonflies than Pond B (without fish)?

Accepted Answer

Fish eat dragonfly larvae

Question 3

Which relationship is correctly classified according to the chapter's own examples?

Accepted Answer

Honeybees and flowers — mutualism

Question 4

How many trophic levels does this chapter name, and what is the fourth (topmost) level called?

Accepted Answer

Four levels; large carnivores

Question 5

What did the 1980s Indian bullfrog frog-leg export story ultimately lead the Government of India to do?

Accepted Answer

Ban the export of frog legs

Question 6

Explain why the chapter describes ecosystem balance as 'dynamic, not fixed.'

Accepted Answer

Balance is actively maintained through ongoing interactions (competition, predation, symbiosis) rather than being a permanently locked state, and can be disrupted by natural or human-made changes.

Question 7

Why does the chapter classify farmland as a 'human-made' terrestrial ecosystem, and what does it say human-made ecosystems need that natural ones don't?

Accepted Answer

Farmland is deliberately created and maintained by human effort rather than arising naturally; human-made ecosystems need ongoing human care and management to keep functioning.

Practice — "How Nature Works in Harmony"

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