What happened during the Pleistocene to cause global cooling?

A) fossil fuel consumption

B) low solar activity

C) a shift in earth's orbit

D) breakup of Pangaea

1. Which of the following can happen if the kidneys fail? a. Toxic wastes can accumulate in plasma. b. Blood-plasma ion levels can increase. c. Kidney dialysis may be necessary. d. All of the above

Explain how DNA polymerase, the double helix structure of DNA, and the base-pairing rules work together to produce two identical copies of the original DNA molecule.

Habitat for the American woodland caribou

If shawn can produce more donuts in one day than sue can produce in one day, then

The function of mucus in the nasal cavities is to A. detect certain scents that the receptor cells can't. B. dissolve odor molecules for detection by the receptor cells. C. provide support to the receptor cells. D.

Cross-cultural research on human development indicates that

Use the drop-down menus to identify the scientists who match the descriptions below.

Which best describes a tendon? a flexible tissue that acts as a shock absorber between bones a somewhat elastic tissue that connects bone to either bone or cartilage a flexible and compressible tissue that provides joint stability a tough and

What are the five organ system to digest a hamburger in your body?

In order to control occasional pain and inflammation, a person uses an over-the-counter drug containing ibuprofen. interestingly, recent research shows that person also may be reducing the risk of contracting which disease?