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9) Natural selection occurs because of all of the following EXCEPT – *
A.)some traits provide an advantage to organisms
B)organisms in a population show variation
C)some populations are related to others
D) better-adapted organisms can survive longer and produce more offspring

10) In order for natural selection to have produced the long necks of giraffes, which of the following must have been true over the evolutionary history of giraffes? *

A)All giraffes, regardless of neck length, had an equal chance of survival
B)The length of necks in giraffe offspring was always longer than both parents
C)In every generation, the length of giraffes' necks showed variation
D)Abundant resources insured that competition among giraffes was limited

Models are non-visual ways of coummincating how someone thinks about something in the natural world

If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly

Awoman whose sister tested positive for a specific mutation in the brca1 gene, which increases the risk for breast and ovarian cancer, is found not to have that mutation but does have a mutation of unknown significance near the known mutation site. how should this woman be counseled? select one: a. she should be informed that her risk for breast cancer is greater than the general population but not as great as her sister’s risk. b. she should be informed that because she does not have the mutation, her risk for breast cancer is not greater than that of the general population. c. she should be informed of her gene mutation status and be presented with all the available prophylaxis options and reconstruction options. d. she should be informed that she does not have the specific mutation but that because another mutation is present she should be vigilant about screening