A gated channel in a cell membrane allows

A. osmosis.

B. simple diffusion.

C. active transport.

D. facilitated diffusion.

Why is water pollution a density independent factors?

What human cell leaves the cell cycle temporarily

Which phrase best describes the tundra climate? A. cold and wet B. cold, windy, and dry C. warm, windy, and dry D. warm and wet

What type of materials are dissolved in a stream's water

8. Where do bacteria that carry out chemosynthesis live?

Which route represents the path taken by the European explorer Christopher Columbus? A) 1 B) 2 C) 3 D) 4

Which gas is the most abundant of the trace gases? A. nitrogen B. oxygen C. argon D. carbon dioxide

Describe the central dogma of molecular biology, briefly describe the processes of transcription and translation.

magine that the animal body produced sperm and eggs with mitosis instead of meiosis. What chromosome number would the autosomes of the third generation have if the first generation had four chromosomes

A well supported testable explanation of phenomena that have occurred in the natural world is called