Phytoplankton live on the ocean surface, capturing sunlight and converting it to energy. Tiny shrimp eat the phytoplankton as a food source. Small fish eat the shrimp as food. The interaction between the phytoplankton, shrimp, and fish is a good example of:

Compared with the background rate of extinction, currently:

What is the BIGGEST human-caused threat to biodiversity?

Which factor affecting the human population is NOT density dependent?

Which type of study manipulates a variable in a test group and compares the responses to a control group?

Which example is NOT a part of critical thinking?

Which type of study manipulates a variable in a test group and compares the responses to a control group?

Why is the concept of community resilience important?

Which statement is NOT true of endemic species?

The length of time nutrients spend in a sink (or reservoir) is called the _____ time.