What cell controls the movement of material between the inside of the cell and the outside world?

1. Nucleus

2. Vacouoles

3. Cytoplasm

4. Cell membrane

What organs are in groups of two in a pigeon

The gene pool for a particular gene is made up of:

What happens in the phloem (A). water moves up from the roots. (B). food moves down from the leaves. (C). food moves up from the roots. (D). water moves down from the roots

Water and Carbon dioxide are waste products released as a direct result of (1) asexual reproduction (2) mechanical digestion (3) natural selection (4) cellular respiration

Many proteins have a structure that allows them to change shape in order to accomplish their function. How could the motor protein kinesin twist, bend or otherwise change shape to accomplish its function?

What is a large, slow-moving rock slab that is part of Earth's crust?

What are food chains?

What happens first in animal response

Can blood got through the plasma membrane?

What is the phenotype ratio for a monohybrid cross of two heterozygous individuals?