Compare the density of gases in the thermosphere to the density at sea level. A) The atmosphere is 100 times denser at sea level.
B) The atmosphere is 10 million times denser at sea level.
C) The atmosphere is 1000 times denser at sea level.
D) The atmosphere is 10 times denser at sea level.

Select the correct answer. which mutation is harmful to the organism? a. a mutation allowing moths to camouflage better on blackened tree bark b. a mutation making staphylococcus aureus resistant to the antibiotic methicillin c. a mutation inhibiting human immunodeficiency virus from attaching to and entering the cell d. a mutation causing uncontrolled cell division e. a mutation giving plant leaves a bitter taste to discourage herbivores from eating them

Did the vinegar diffuse all the way to the center of any of the cubes? if so, which ones? what does this tell you about surface area-to-volume ratio and the diffusion rate?

What are antigens and antibodies? how are they involved in the body’s response to incompatible blood?