T or F: natural selection is an observable fact

Fermentation recycles NAD+. True False

An example of a scientific question that could be investigated

A student makes a drawing of a carbon atom. Which of these should the student show in the nucleus of the atom? a. Valence b. Protons c. Electrons d. lons

A relationship in which one organism lives in or on another organism and benefits from that relationship while the host organism is harmed by it

Derived characters are traits

A red blood cell is 8 μm in diameter. If drawn 100 times larger than its actual size, what diameter will the drawing be in mm? A. 0.08 mm B. 0.8 mm C. 8 mm D. 80 mm

Which kind of biologist would most likely use satellite technology?

What is the complementary base of adenine in DNA? guanine cytosine thymine uracil

Fish in a marine environment must maintain a relatively constant ion concentration in their tissues and blood. How do the chloride cells in the gills aid fish in the removal of excess ions? A.

Name three groups of plastic sedimentary rocks