Organisms so similar to one another that they can breed and produce fertile offspring.

Groups of individuals that belong to the same species and live in the same area.

Groups of different populations that live together in a defined area.

A collection of all of the organisms that live in a particular place, together with their nonliving, or physical, environment.

A group of ecosystems that have the same climate and similar dominant communities.

All of the portions of the earth, including the land, water, and atmosphere, in which life exists.

The term for an organisms that is composed of one cell.

What allows a single cell to change and become the different cells needed to support life?

Living things are able to maintain stable internal environments using...

The type of reproduction that requires genetic material from two parents is called...

The type of reproduction that only requires one parent is called...

The chemical reactions that break down food to release energy.

What is the general term for something that causes an organism to respond to their environment?

Organisms that automatically make their own food using energy from the sun or chemicals are called.

The process that autotrophs use to create energy when they do not have access to sunlight.

The process that autotrophs use to make energy in the presence of sunlight.

Organisms that break down and obtain energy from dead organic matter are called...

Organisms that feed on detritus, the remains of plants and animals are called...

Ecologists use these diagrams to study ecosystems because they are more realistic and contain many different feeding relationships.

True or False: Autotrophs --> 1st-Level Carnivores --> Herbivores --> Top-Level Carnivores

A diagram that shows the amount of energy or matter in each trophic level of an ecosystem is called a(an)

What statement below describes the trend seen in ecological pyramids?

What percentage of energy is past from one trophic level to the next?

________________________ is the total amount of living tissue in a trophic level.

The evaporation of water from the leaf of a plant.

Starting at precipitation, what is the correct order of the water cycle?

Which set of processes release carbon into the atmosphere?

Occurs when soil bacteria convert nitrates back into nitrogen gas.

The rate at which organic matter is created by producers.

Nutrients that are very scarce or move through biogeochemical cycles very slowly are called __________________ nutrients.