Which non-mammal organism has a connection to supply nutrients to developing embryos similar to the mammals?
a. sea snake
b. sea turtles
c. hammerhead shark
d. manta ray
e. sea turtle
C
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Most chromosomes are paired and are both inherited from either the mother or the father
A. true B. false
Gametes are formed at stage ____
a. A b. B c. C d. D e. E
In the experimental evaluation of a new drug, what is the purpose of a placebo?
a. A placebo increases the sample size. b. A placebo prevents errors in recording of the data. c. A placebo removes the bias of the physician in charge of the experiment. d. A placebo removes the potential psychological bias of the patient in the study. e. A placebo prevents sampling errors from compromising the results of the experiment
A major fully reduced form of carbon, important in biogeochemical cycling is ________.
A. methane B. hydrogen sulfide C. carbon dioxide D. carbohydrate