A ___ is a particular type of living things that can breed and reproduce

During a major ice age, sea levels

Primary consumers are organisms that directly feed on producers. List the organisms that would be classified as primary consumers:

Gene expression in eukaryotes can be regulated at many different levels. List the different levels of regulation, and explain what each means.

The three particles that make up atoms are

What are two ways that current flows might affect ocean organisms and species?

What is the main cause of human-created mass extinction?

Earth rotates around the sun. true false

When scientists first started mapping human genes, they estimated that there were about 2 million genes. By the late 1990s, it was thought that there were only 100,000 genes, and then that number shrank to 19,000 in 2001.

Which statement best describes how light travels? Light, in a vacuum, travels at the same speed even if the light source is moving. Light given off from a moving source will travel faster in a vacuum.

How are fished adapted to their environment?