Two species of frogs are unable to mate with each other because they have different mating calls. This is an example of

A) genetic drift

B) geographic isolation

C) none of these

D) reproductive isolation

Wegener's hypothesis of continental drift was finally confirmed by

Two scientists do not agree on which type of grocery bag is better for the environment what is the most likely outcome of their disagreement

What two systems work together in the human body to aid in support and movement?

Skin, mucous, T cells, macrophages, fever, antibodies, bacteria, B cells. Which of these are specific defenses of the bodies immune system.

Heat is transferred from the sun to your skin by ... ? A. radiation B. conduction C. convection D. refraction

Molecules with a relatively high lipid solubility are capable of crossing the membrane a. through specific lipid channels. b. directly through the lipid bilayer. c. only with the addition of energy. d. indirectly by moving across a carrier protein.

Which is the correct representation of energy flow through an ecosystem?

Semi-permeable structure to contain all of the cell parts and to control what goes and comes out of the cell

Sinusitis, an inflammation of the paranasal sinuses, is brought on by a viral, bacterial, or fungal infection. the most commonly affected paranasal sinuses are the most inferior ones, which are called

Which processes are caused by convection currents in the mantle? Check all that apply. 1. earthquakes 2. ridge push 3. tsunamis 4. slab pull 5. volcanic eruptions 6. subduction