Which statement best describes the central nervous system?

A) It senses stimuli and carries out a reaction.

B) It secretes hormones.

C) It is made up of all nerve cells.

D) It is made up of the brain and the spinal cord.

A measurement of a star's brightness is called

If only the deterministic hypothesis is correct, undifferentiated stem cells isolated from bone marrow and grown in vitro will:

Identify the biotic factor of an ecsystem for the following

Where would you most likely find an integral membrane protein? a. on the outside surface of the cell membrane b. spanning the cell membrane c. floating freely in the cytoplasm d. on the inside surface of the cell membrane

Checks to see if the DNA has been damaged and if the cell is large enough and healthy enough to divide.

What is unique about dogs?

3. The best thing you can do to keep a positive relationship with your supervisor is to

What contains both communities and ecosystems?

Which of the following represents a way that animals in a zoo are influenced by their environment? a. increased natural instincts b. decreased aggression c. unnatural behavior d. increased appetite

when the process of mitosis is correctly completed, the daughter cells should contain exact copies of all of on organisms genes. which biomolecule contains all of the organisms genes