Sec 2 Science Ecosystems topical questions

Define an ecosystem.

Name one physical factor and one adaptation of a desert plant.

State what the arrows in a food chain represent.

Name the relationship in which both organisms benefit.

State one role of decomposers.

Use this chain: algae → tadpole → fish. Name the producer and explain one effect of removing the algae.

Explain the difference between parasitism and predator–prey, using one example of each.

Compare photosynthesis and respiration in one sentence each.

Explain why a food web describes a habitat better than a single food chain.

Give one human activity that can reduce biodiversity, and state how.

A student writes “Sun → grass → rabbit” and says the Sun is the producer. Evaluate the chain.

Oxpeckers eat ticks on buffalo. Classify the tick–buffalo relationship and the bird–buffalo relationship.

Explain how photosynthesis and respiration move carbon dioxide in opposite directions, and why decomposers still matter.

A road is built through a forest. Predict one effect on a food web there, and one effect on a physical factor.

Explain why predator and prey numbers can rise and fall together over time.