Unlike red blood cells, white blood cells A. can live for many years. B. are made in the bone marrow. C. are the most numerous cells in the blood. D. carry oxygen through the body.

Which of the following best describes natural selection? 1. A tornado wipes out 95% of a beetle population and is repopulated with the remaining beetles; 2. Some wombats have longer nails, enabling them to obtain food more efficiently and survive; 3.

How do mutations increase variety

What is a group of organs working together called

Use the figures to select the best definition of polyglob. a polyglob has three solid-colored dots, three legs, and a colored body. a polyglob has three circles and three legs. a polyglob has three solid-colored dots and three legs.

Compare the formation of igneous, sedimentary and metamorphic rocks. Which process is the most direct, which is the most complex?

Which one of the following statements accurately describes a characteristic of red blood cells? a. They lack hemoglobin. b. They're convex disks with a large nucleus. c. They're agents of inflammation. d.

During action potential propagation in an unmyelinated axon, why doesn't the action potential suddenly "double back" and start propagating in the opposite direction?

How has our understanding of membrane permeability changed since the discovery of aquaporins?

If you compare the climates of a mountainous area and a lowland area that are located at the same latitude what would you generally find"

Which antibiotic does not inhibit cell wall synthesis?