Is/are used by the body to synthesize Vitamin D, maintain the proper functioning of nerve cells, keep skin soft and supple, and transport fat to cells.

When predators consume prey that contain a toxic material, such as mercury, they may end up with a high quantity of the material in their bodies that can affect their populations and public health if they are consumed.

What structure is made up of microfilaments and microtubules and provide structure to the cell?

Why does the oxygen atom in a water molecule have a negative charge? A. Hydrogen bonding pulls electrons toward oxygen. B. Water is made of two ionic bonds. C. Oxygen attracts electrons more strongly than hydrogen does. D.

Above is an example of a food chain or pyramid. Ultimately, either directly or indirectly all organisms on this food chain get their energy from what single source?

As hominids evolved, their litter sizes decreased and their gestation period increased. Which of the following inferences can be made based on this observation? Reproductive success would increase, since mothers had to carry fewer offspring.

How do cells correct errors in DNA that would disrupt their function

Which is true of oxidation? a) It is a physical process b) No change occurs in the makeup of rock c) Rocks weather at different rates d) Water freezes in cracks in rock

What is the function of the pigment molecules in a light-harvesting complex in the thylakoid membranes?

How do natural actions such as weathering, erosion, and soil formation affect Earth's surface?

In which species of animal does sebum eventually become lanolin?