Which of the following statements best describes theories?
a. they are nearly the same things a hypotheses
b. they are supported by, and make sense of, many observations
c. they cannot be tested because the described events occurred only once
d. they are predictions of future events
Ans: b. they are supported by, and make sense of, many observations
You might also like to view...
Which of the following organisms is the most common cause of cystitis?
A) Chlamydia trachomatis B) Escherichia coli C) Neisseria gonorrhoeae D) Trichomonas vaginalis
Which observation led Darwin to propose that the glyptodont is related to the armadillo?
a. Both species lived in the same region at the same time. b. Both species went extinct at the same time. c. Both species are adapted for marine life. d. Both species have helmets, bony shells, and unusual bony plates. e. Each species is found in different regions of the world.
Neuroglial cells
a. metabolically support other neurons. b. form sheaths around neurons and increase the rate of impulse transmission. c. form more than half of the volume of the brain. d. provide physical support. e. do all of these.
As red blood cell components are recycled, the heme group is converted by the liver to ____
a. bilirubin b. bile c. iron d. proteins e. amino acids