A3.2 - Interdependence of Organisms

In a Caribbean pasture, the sequence grass → cow → human shows:

In the food chain seagrass → sea urchin → snapper → shark, the snapper is a:

Which statement best explains why green plants are necessary in all food chains?

Which set contains ONLY producers?

In Human and Social Biology, interdependence of organisms means that:

Which group of organisms is described as producers in a food chain?

Which term describes an animal that eats only plants?

In the food chain grass → goat → human, the goat is a:

Which of the following is the BEST definition of a food chain?

In any food chain, arrows are drawn to show:

Decomposers such as bacteria and fungi are important because they:

In the marine food chain phytoplankton → small fish → tuna → shark, the tuna is at which trophic level?

In a freshwater pond, the chain algae → insect larvae → tilapia → heron shows that the tilapia is:

Which set shows organisms in the correct order from producer to tertiary consumer in a Caribbean woodland?

Which statement about food webs is TRUE?

In a mangrove swamp, crabs eat fallen mangrove leaves and small fish eat the crabs. Humans catch and eat the small fish. In this chain, humans are:

Why do most food chains have only three or four trophic levels?

Which statement correctly describes an indirect way in which humans depend on plants?

A simple marine food web includes: phytoplankton, zooplankton, small fish, large fish, sharks and decomposers. Which change is MOST likely if pollution kills many phytoplankton?

In the food chain seagrass → parrot fish → barracuda → shark, which row correctly matches each organism to its trophic level?

Why might removing top carnivores such as sharks from a marine food web eventually affect the producers?