An ocean food chain is shown.

Which organism is a tertiary consumer?

A. Clownfish
B. Brittle star
C. killer whale
D. Octopus

Name the following: (a) category of pathogen that causes diseases, like common cold and mumps. (b) the microorganism that requires a host to produce.

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

If one were to horizontally divide the earth in half at the equator each half would be a