What does it mean for a cell membrane to be selectively permeable?

A. It allows some substances to pass through but blocks the passage of others.

B. It allows only water molecules to pass through.

What is an extremophile? Give an example

The class frogs are in

Which is not classified as a living thing? a. bacteria b. giant kelp c. slime mold d. virus

Grasses → mice → cat → coyote As matter and energy move from grasses to coyotes the amount of available energy

By which processes are rocks broken up and moved to different locations? A) Burial and cementation B) Evaporation and condensation C) Compaction and transportation D) Weathering and erosion

Which of the following best describes a noncontact force? A. a force that is able to act at a distance B. a force that must be physically touching the object it acts on C. a force that always pulls objects backward D.

Which type of energy used on earth comes directly from the sun

Aldosterone is secreted in response to changes in: select one: a. blood potassium levels. b. blood calcium levels. c. blood pressure. d. body temperature. e. blood glucose levels

How does a mutation in dna cause a disease that affects multiple organs?

Dylan is on a strict vegan diet. He doesn't consume meat, fish, eggs, or dairy products. Which nutrient is difficult to obtain naturally from a vegan diet