Gabriel is at a stage where his body is changing physically; he is growing facial hair and building muscle. He is also just starting to make sperm.

What is most likely Gabriel's age:

A) 5

B) 12

C) 17

D) 21

The action potential is caused by permeability changes in the plasma membrane.

At the end of mitosis each of the two cells has a complete set of chromosomes. True or false?

True or false? If a cells surface area to volume ratio is too high, substances cannot move through the cell quickly enough to meet the cells need

Which of the following is true about natural selection? A. Natural selection causes changes in populations because of the differential reproductive success of genetically varied individuals. B.

The loss of water from a plant by transpiration cools the leaf. movement of water in transpiration requires both adhesion to the conducting walls and wood fibers of the plant and cohesion of the molecules to each other.

Which of the following is true concerning the earth's geologic plates? They are affected by climate change They dont move They move They are effected by the earth's weather

Which answer correctly compares the Krebs cycle and the electron transport chain?

What would happen if u remove a level from the levels of organization

For a constant voltage increasing the temperature will

Many years ago, a scientist grew pea plants that produced wrinkled peas. The peas from these plants produced new plants that also produced wrinkled peas.