The first eukaryotes were undoubtedly

A) muscle cells

B) protistans

C) neurons

D) none of above

Choose the law that BEST explains the example: Pushing off the wall at the ice skating rink and going the opposite direction is an example of Newton's Group of answer choices 3rd law None of these 2nd Law 1st law

Name the source glands and functions of the following hormones (a). Thyroxine. (b) Insulin. (c) Testosterone

Explain the stages of a spider life cycle

What will most likely result when the jet stream moves south of North Carolina

Unwanted dumping of chemicals has caused pollution in a particular region, leading to a decrease in the number of insects. Bluebirds feed on these insects, and bigger birds prey on the bluebirds.

Carl wants to find out how exercise affects the body temperature of different people. What tool will Carl need in order to conduct his experiment?

3 How does rain form? Water rises, cools, evaporates, and then condenses. Water cools, condenses, evaporates, and then rises. Water evaporates, cools, rises, and condenses. Water evaporates, rises, cools, and then condenses.

Which are biotic factors in an American alligator's environment? Choose all answers that are correct. A. temperature of the water B. amount of oxygen gas in the water C. type of grass needed for nests D. number of available mates

If you are told that the frequency of a recessive allele in a population is 10%, you are directly given q, since by definition q is the frequency of the recessive allele.

Which individual is at the least risk for osteoporosis? thin, elderly male male weight lifter in his 20s petite asian female thin caucasian female in her 40s?