Cystic fibrosis affects about 200,000 people in the united states.

a. True

b. False

Scientific theories are explanations for scientific phenomena that can be changed when and if new information is found to support or refute the explanation. Which of the following statements provides an example of a scientific theory? a.

g Using these types of genetic changes: Base substitution Transition Transversion Missense mutation Nonsense mutation Insertion Deletion Frameshift mutation Label these genetic changes (a-e). More than one answer may apply to each answer. a.

2. What can be inferred about the genotype of II-5 based on that person's descendants?

What structure is missing in a animal cells but present in almost all other all types

Sentence for keystone

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?