Which of the following chemicals is the first
hormone secreted by the intestinal tract in response
to the presence of food?
a. insulin
b. cholecystokinin
c. gastric inhibitory peptide (GIP)
d. gastrin
e. secretin
Answer: d
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The lightly shaded countries have diversified export bases. The darkly shaded countries depend on ________ for foreign exchange (export earnings)
A) one or two commodities B) the service sector C) energy resources D) tourism E) both a and b
Latitude lines are referred to as parallels because they parallel one another
Indicate whether the statement is true or false
If a DNA sequence on one strand is ATCGATG, what is the corresponding sequence on the other strand?
a. TAGCTAC b. UAGCUAC c. TUGCUTC d. ATCGATG e. TTACGTC
Which of the following statements about skeletons is NOT true?
A. All exoskeletons must be shed as the animal grows. B. An earthworm has a fluid-filled cavity that acts as a hydrostatic skeleton. C. The skeleton of a clam is an exoskeleton. D. The skeleton of an arthropod is an exoskeleton. E. The skeleton of a vertebrate is an endoskeleton.