Which of the following are examples of homologous structures?
a. whale flipper and cat leg
b. human eye and octopus eye
c. bird and insect wings
d. body shape of sharks and dolphins
e. penguin wing and fish fin
ANSWER: a
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Which of the following affects the osmolarity of a solution? I) concentration of cations II) concentration of anions III) concentration of water
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The type of bond that exists between amino acids in a protein is a(n) ____ bond
a. peptide b. hydrogen c. ionic d. glycosidic e. primary
It is difficult being on a vegetarian diet because
A. vegetables are more expensive than meats. B. no one can survive long periods without eating meats. C. there is no way to obtain all necessary nutrients by only eating plants. D. you have to be sure that you eat the proper combination of plant foods in order to obtain all the essential amino acids.
In the pine life cycle, when does fertilization often take place?
a. a few days before pollination b. at the same time as pollination c. a few weeks after pollination d. months to a year after pollination