Ecosystems Test Practice

Which of the following is a biotic factor in the prairie ecosystem?

• water

• sunlight

• soil

• grass

The place where an organism lives and that provides the things the organism needs is called its

• habitat

• population

• species

• community

Which of the following is an example of a population?

• the cats and dogs in your neighborhood

• the bushes and grass in a park

• the rocks in a rock collection

• the gray wolves in a forest

The largest population that an environment can support is called its

• carrying capacity.

• limiting factor.

• birth rate.

• death rate.

A certain snake species in an ecosystem eats small rodents. If a bird species is introduced into the ecosystem that also eats small rodents, which of these will most likely increase?

• Parasitism

• Migration

• Mutualism

• Competition

The Escherichia coli that live in your intestine and help break down food are an example of which type of interaction?

• competition

• mutualism

• parasitism

• predation

All the following are examples of limiting factors EXCEPT

• food

• soil

• space

• weather conditions.

An organism’s habitat must provide all of the following EXCEPT

• food

• water

• predators

• shelter

What impact do resources, such as sunlight and water, have on a forest ecosystem?

• They limit the carrying capacity of the ecosystem.

• They increase habitat areas for new organisms entering the ecosystem.

• They decrease the number of diseases resulting from overpopulation.

• They alter the rate of photosynthesis, resulting in more oxygen being produced.

The table shown represents the relationships between different organisms.

Which relationship is parasitic?

• 1

• 2

• 3

• 4