Positively charged particles located in the nucleus of an atom are

A. Protons

B. neutrons

C. Electrons

D all of these choices

Which describes the modern classification system? A. based on evolutionary relationships B. called Linnean classification C. based on similar appearances D. called Darwinian classification

6) An increase in the amount of living material in an organism is called

Which statement describes the ability of the cell membrane to allow various substance to move through it? The cell membrane is selectively permeable. O The cell membrane is composed of lipids and phosphates.

Below are steps performed to make an E. coli bacteria that can make human insulin protein for the health care market. List these steps in their proper order. a.

Hormones regulate certain activities of the immune system. a. True b. False

The plasma membrane controls what enters and leaves the cell

What type of UV light is used during tanning beds and why is it so dangerous?

As a seed plant grows the roots grow downward due to the force of

Egg laying land animals have evolved to produce eggs with tough shells to ensure that

Which of the following statements describes a proton of an atom? A has a negative charge and is located in the nucleus. B has no charge and is located in the nucleus C has a positive charge and is located in outer energy levels.