The anglerfish is a saltwater fish that lives in the deepest parts of the ocean. There, food and light are scarce. The anglerfish has a small projection, or lure, coming out of its head. When the angler fish moves its lure, the lure baits other fish. When a fish comes in for the bait, the anglerfish eats it. Which best explains why anglerfish have lures?

The fruit and leaves of a certain tree make the soil around it poisonous to other plants. Seedlings of the tree aren't bothered by the poison. What does this show?

Which of the following is biotic factor in the environment?

What effect does the introduction of exotic species have on native species?

A bison's primary food source is grass. If the amount of grass in a region where bison live were reduced, which of the following would happen?

What would happen if a large number of rain forest plants were cut down?

Lions hunt and eat antelope that graze in the African grasslands. If Africa has no rain for a long period of time, and plants die, what will happen to the population of lions?

In an ecosystem where some birds depend on insects to survive, which of the following is most likely to happen if someone sprays a pesticide to control the insect population?

Which of the following could limit the growth of a population of squirrels in a local park?

Four scientists observed a strip of land that had been cleared of all trees and bushes to make space for a power line. Each scientist had a different argument about the impact clearing this area of land might have on the bird population living in the ecosystem. Which scientist’s argument demonstrates how the ecosystem will most likely be impacted?