Positive feedback systems play a role in ____
a. blood pressure control
b. fluid volume regulation
c. body temperature regulation
d. child birth
e. blood glucose regulation
ANSWER: d
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Sponges have a bone-like support system of spicules that are made up of which of the following materials?
a. calcium and hydrogen b. cellulose and silica c. calcium carbonate or silica d. chitin or calcium carbonate
A forensic anthropologist, participating in a police investigation involving an unidentified corpse, announced that the body belonged to someone who had been left-handed. How was she able to decide this?
What will be an ideal response?
An oil may be converted into a substance that is solid at room temperature by
A) adding hydrogens, decreasing the number of double bonds in the molecules. B) removing water, causing a dehydration reaction to occur. C) removing hydrogens, increasing the number of double bonds in the molecules. D) cooling it, so that double bonds form and the fats solidify.
The definitive hosts for Echinococcus granulosus are
A. bovines. B. canines. C. cats. D. pigs. E. snails.