Why are nitrogen-fixing bacteria so important to other organisms?

The role of environmental factors in cellular differentiation is to a. induce or repress gene expression. b. assist a cell in dividing and transmitting its dna to new cells. c. prevent a cell from dividing and transmitting its dna to new cells. d.

Compare and contrast the structure and function of a unicellular organism to that of a multicellular organism

The shape of the eye is largely determined by the

Which of an atom's subatomic particles are involved in chemical bonding? A. neutrons only B. valence electrons only C. neutrons and protons only D. protons and valence electrons only

What is an example of a diploid cell?

This gland controls all other glands. a. sweat gland b. pituitary gland c. thyroid gland d. salivary gland

Sometimes two or more drugs are so similar in their actions on the brain and the body that as people build a tolerance for one drug, they are simultaneously developing a tolerance for the other. This is known as:

The benefit of measuring the initial rate of a reaction, V0, is that early in the course of the reaction, A) Km is the substrate concentration at which V0 = Vmax. B) The rate of product formation is linear and [S] has not been lowered significantly.

Due to high cost, there are very few wildlife refuges in the U. S true false

Earth is made mostly of metals and rocks. where did this material come from?