Melanin is produced in ____.
A. connective tissue
B. muscle tissue
C. the deepest layer of the epidermis
D. the dermis
E. the circulatory system
Answer: C
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Most human embryos that are aneuploid
A. result in Down's syndrome. B. result in sterility. C. are spontaneously aborted in the first trimester. D. can develop and survive to adulthood. E. are usually the result of increased nondisjunction in the gametes of older men.
This diagram shows a simplified representation of bioenergetics, with arrows representing transfers of energy between various ecological components. Where do humans fall in this diagram?
a. from the sun to decomposers
b. from producers to producers
c. from decomposers to consumers
d. from consumers to the sun
Which of the following is a lipid-derived hormone?
a. thyroxine b. human growth hormone c. estradiol d. insulin
Recombinant DNA technology can be used to make which of the following?
A)Vaccines B)Human hormones C)Drugs D) all of the above