The difference between natural selection and artificial selection is that:

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?

What is the BIGGEST human-caused threat to biodiversity?

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

Which choice represents the CORRECT hierarchy of organization from largest to smallest?

Compared with the background rate of extinction, currently:

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:

Which factor ensures that only quality scientific studies that have been well controlled and avoid bias appear in scientific journals?

Which statement is NOT true of endemic species?