Calcium levels are primarily under the control of ____
a. calcitonin and thyroxine
b. prolactin and oxytocin
c. prolactin and oxytocin
d. parathyroid hormone and thyroxine
e. progesterone and ADH
ANSWER: b
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A ripened ovary is called a(n)
a. endosperm. b. fruit. c. ovule. d. seed
Because they are made up of similar bones, the flippers of whales and the wings of birds are examples of...
a) vestigial organs b) embryos c) homologous structures d) fossil structures
Hydrogen peroxide is an effective
A) sterilizing agent. B) disinfectant. C) antiseptic. D) disinfecting and sterilizing agent. E) antiseptic and disinfectant.
There are several problems associated with the use of new GMOs. One of which is ________
A) the yields from the genetic modification may not be useful in the field B) the GMO could prove dangerous for human consumption C) the ecological impact is well known D) the ecological impact is largely unknown