Select the limiting factors below.

A close relationship between two species.

Most producers make their food using energy from where?

Select the consumers.

What traces the path of energy as it moves from one organism to the next in an ecosystem?

Most organisms get energy by combining oxygen from the air with food in a process known as

Plants, algae, and some bacteria take in carbon dioxide from the environment and use it to make food through the process of

Select all the biomes.

Dry environments that usually receive less than 25 cm of rainfall each year.

Select all the freshwater ecosystems.

Type of marine ecosystem common in many tropical regions.

The Greek philosopher ______ was the first person known to classify living things scientifically.

In the system used today, the groups that have the largest number of different organisms are called...

Select all the vertebrates.

Animals with distinct body sections, jointed legs, and a hard body covering that forms an outer skeleton.

Any plant that has tube-like structures for the internal transport of food and water is classified as a...

Food made in the leaves is carried to where it is needed in tissue called...

Plants that do not have vascular tissue are classified as...

Select all of the following plants classified as herbaceous.