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.

Which is not characteristics of all mammals? a. a four-chambered heart that prevents mixing of oxygenated and deoxygenated blood b. giving birth to live young (viviparous) c. having hair during at least some period of life d.

An organism that eats other organisms is called a ...

If a little boy inherits the "A" allele from his mother and the "a" allele from his father, which type of the following individuals is he? A. a heterozygous individual B. a homozygous dominant individual C. a monozygous recessive individual D.

Pick one of anna's illnesses and explain all of the ways the illness affected three different body systems.

How realistic do you think was the contagion movie?

Which is used to make many copies of DNA? A. PCR B. Reverse transcriptase C. Gel electrophoresis D. Nuclear tranfer

Light___. requires a medium to travel is refracted when it bounces off a shiny surface is created by vibrations in electric and magnetic fields moves in longitudinal waves

Skin cancer is to exposure to uv radiation as

What is the function of the sacrum?

In theory the enzymes should work in colder conditions but at a lower rate, why?