The cell membrane is selectively permeable because

A-particles can quickly pass through it.

B-only nutrient molecules can pass through it.

C-only certain particles can pass through it.

D-all particles can pass through it.

The process of meiosis produces only gametes, eggs or sperm. According to the diagram, how many sperm are formed from each cell that undergoes meiosis?

You want to estimate the number of canvas backs (a type of duck) at the Sacramento Wildlife Refuge. In two days you capture 200 canvas backs, mark all of them and release them.

When a cat drop from a trees to the grounds the conversation of what

How are food and water shortage related to pollution

When does atp release energy?

What is a recessive gene? a. The gene that displays itself. b. The hidden gene. c. The gene that is dominant.

Much of the fluid that moves across capillary walls and into the tissues moves as a result of filtration, forced by blood pressure. o2 on the other hand travels from the capillaries into the tissues as a result of what?

Which organisms are extremely small and use hosts as both home and food supply

Explain generaly how Cyclin and Cyclin Dependent Kinase (CDK) work to control the cell cycle.

The outer periphery of the intervertebral disk is composed of strong fibrous tissue called the: