How does a threshold prevent a neuron from generating too many action potentials

Which option describes Darwin's theory of natural sections? Select all that apply 1. Natural selection results in descent with modifications 2. Evolution occurs because of natural selection 3. Natural selection occurs because of evolution 4.

B) humans and chimpanzees have very similar dna. what does this say about these two species

Brown rabbits have to genotype of BB or Bb. White rabbits have the genotype of bb. If two brown rabbits, with the genotype Bb and Bb have baby rabbits what it the likely hood the rabbits will be brown?

What fruit contains the enzyme bromelian?

A factor that is manipulated in an experiment is a dependent variable. a. True b. False

How are diffusion and osmosis different? A. Osmosis is the movement of proteins. Diffusion is the movement of water. B. Osmosis is the movement of water. Diffusion is the movement of chemicals and molecules. C.

Hich term describes the maintenance of a steady internal state in the body?

Natural Killer cells react in predictable ways. Put the following steps in order to describe the actions of an activated NK cell. A. Recognition and adhesion B. Section of perforins C. Lysis of the abnormal cell D. Realignment of Golgi apparatus

In the Hershey-Chase experiment, the material that entered cells upon infection by T2 virus was labeled with which radioactive isotope?

Compared to absolute dating, what is a disadvantage of relative dating? Fossils must be in undisturbed rock layers to determine age. Age, in years, cannot be determined for an individual fossil.