What are WBCs and what do they create to fight off infections?

what is the thermal energy that flows from one substance to another when the substances differ in temperature.

A field contains two related species of flowering plants. Species A has a diploid chromosome number of 22, and species B has a diploid chromosome number of 26.

At the end of meiosis 2, each of the haploid sex cells has only half the number of chromosomes as the original diploid cell. Why is this important?

What would most likely cause the future acceleration of the expansion of the universe? O radiation from the Sun O the existence of background radiation O the continued existence of dark energy O light shifts identified by the Doppler effect

What is an important function of wetland with regard to water supply?

What is improper to use to draw-up a liquid into a pipette?

Why are theories modified but only rarely?

What do fats, steroids, and waxes have in common? what do fats, steroids, and waxes have in common? (a) moderate polarity. (b) low solubility in water. (c) they occur in membranes. both (a) and (c). both (b) and (c) ?

How does gravity keep the moon in orbit

In the lungs, oxygen diffuses into the blood and is loaded onto hemoglobin for transport. in the tissues, oxygen is unloaded from hemoglobin and diffuses from the blood into nearby cells. what drives the diffusion of oxygen?