Chapter 3 Ecology

____________ eat only plants.

Which of the following is considered a decomposer?

What type of organisms convert nitrogen from a gas to a liquid? And from a liquid to a gas?

In the biosphere, energy _______ and nutrients _____.

What trophic level is the grasshopper?

A _________ is made up of interacting populations in a certain area at a certain time.

Autotrophs normally make energy through what process?

Which of the following is an example of a heterotroph?

Which of the following is NOT one of the ecological pyramids?

_____ break down the bodies of dead things into simpler molecules are more easily absorbed.

The total amount of living tissue within a given trophic level is called its _______.

_______is the study of interactions that take place between organisms and their environment.

An organism that usually uses light energy to make energy-rich compounds is a/ an ____

____ eat both plants and animals.

_____ eat only meat

________ eat dead meat other animals have killed.

A/An _____ is made up of interacting pops. in a community and the community’s abiotic factors.

As you move up the food chain, the amount of available energy _____.

How much energy is passed from one trophic level to the next?

An organism that cannot make its own food and feeds on other organisms is called a/ an ____.

__________ occurs when bacteria convert nitrogen gas into ammonia on the roots of legumes.

Which of the following is an abiotic factor of a desert ecosystem?

What is the only biotic part of the water cycle?

A/ An _____, shows all the possible feeding relationships at each trophic level in a community.

Why do plants and animals need nitrogen and phosphorus?

What trophic level is the grass?

A ___ is a group of organisms, all of the same species, which live in the same area.

What trophic level is the eagle on in this food chain?

How do animals get the nitrogen that they need?