Which endocrine gland is the main center for control
of the internal environment?
a. pineal and thymus
b. hypothalamus
c. thyroid and parathyroids
d. adrenal cortex and adrenal medulla
e. pancreas and gonads
Answer: b
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In the amniote egg diagram shown, the item labeled "3" is the
a. yolk sac. b. chorion. c. allantois. d. amnion. e. albumin.
During digestion
a. carbohydrates are split into proteins. b. proteins are broken down into fatty acids. c. fatty acids are split into non-fatty acids. d. carbohydrates, proteins, lipids, and nucleic acids are split into smaller chemical subunits. e. carbohydrates, proteins, lipids, and nucleic acids are split into larger chemical subunits.
Marc Spehr and his colleagues demonstrated which of the following?
a. Sperm cannot detect and swim toward attractant molecules. b. Sperm attraction can be stimulated by chemicals. c. Eggs release chemicals that attract sperm. d. Sperm can detect and swim toward attractant molecules, and sperm attraction can be inhibited by chemicals. e. Sperm can release chemicals that kill other sperm
Which of the following is NOT correct
concerning a tubal pregnancy?
a. they can be caused by endometriosis b. they can threaten the life of the mother c. they can be caused by STDs d. fetuses that come to term must be delivered by Caesarian section e. all of these are true concerning a tubal pregnancy