Topic Test Answers

Which of the following is a possible reason for migration?

Which of the following is not an example of predation?

Consider the following food chain:Garden plants are eaten by snails, which are eaten by birds, which are eaten by the household cat.

Bees obtain food they need from flowers. The flowers benefit by having their pollen dispersed by the bees as they travel from flower to flower. What type of symbiotic relationship is this?

Water is an abiotic factor in terrestrial environments.

Which level of consumer has access to the smallest supply of energy?

Echolocation is an adaptation bats use to _______.

The open ocean, sea floor, and coral reefs are all examples of habitats with high rates of primary production.

Which of the following is a possible long-term consequence of two organisms occupying the same niche?

What is a possible cause for a decrease in ecosystem productivity?

The Great Burdock plant’s seeds have spines on them that attach to the fur of animals that brush against it. The seed then travels with the animal until it eventually falls off, which spreads the plant’s seeds farther than the plant could have done. What type of symbiotic relationship is this?

Which marine habitats would have the least access to primary producers?

Given that water serves as an environmental thermoregulator, which of the following biomes would you expect to have the most stable temperatures?

Many dogs bark when unknown individuals approach their house. What type of interaction is this?

The four essential elements for life are _______.

Organisms can have positive or negative impacts on the ecosystem they live in. The cane toad, or Rhinella marina, was introduced to the Hawaiian Islands in 1932 by sugar cane farmers. Farmers released the toads in their crops to help control pests that were damaging the sugar cane. The cane toad has few natural predators, as it secretes a poisonous toxin from its skin that deters larger organisms from eating it. As a result, the cane toad population thrived and grew to number hundreds of thousands by 1935. Photo by Patrick Gijsbers Which role does the cane toad play in the Hawaiian Islands?

Bruce believes that male students in his physics course spend more time working on homework than female students. His teacher and classmates are skeptical, so they asked him for proof. Which of the following would be the best way for Bruce to prove his point?

How can an increase in biodiversity lead to an increase in ecosystem stability?

The principle characteristic distinguishing marine and freshwater ecosystems is _______.

Which of the following aquatic environments would not freeze in winter?