Which are substances that are moved into cells by facilitated diffusion?

viruses and bacteria

ions such as K+

fat-soluble molecules

oxygen and carbon dioxide

Hox genes determine an animal's A. body plan. B. size. C. skin color. D. eye color.

hypertonic, hypotonic, isotonic? "the concentration of the solute in the solution is lower than the concentration inside the cell"

Discuss at least one benefit and one drawback of establishing a mandatory recycling program in the United States.

How was the Clean Air Act of 1970 different from previous legislation aimed at reducing pollution? A. It put regulation in the hands of the federal government. B. It was the first law struck down by the EPA. C.

Using full detail, describe seafloor spreading and the process that occurs at these locations to create mid-ocean ridges. Using full detail, describe subduction and the process that occurs at these locations to create deep-ocean trenches.

Which structures could most likely be observed in cells in the low-power field of a compound light microscope?

If severe brain loss occurs before age 60, then it is usually due to drug abuse, poor circulation, viruses, and genes, not the result of normal aging. Thus, this is disease connected or: Deductive Vocational Metabolic Pathological

When enzyme action stops due to a build up of end product, this control is called ... ?

A pharmaceutical company is promoting a new estrogen skin patch for birth control. They say it is better because a woman only wears the patch for one week and then wears no patch for three weeks. Explain the logic behind this proposal.

Select the correct statement about nephrons. A. Podocytes are the branching epithelial cells that line the tubules of the nephron. B. Filtration slits are the pores that give fenestrated capillaries their name. C.