The Cretaceous is the period in which
a. mammals diversified and flourished.
b. life appeared on this planet.
c. the first animals with shells and skeletons appeared.
d. the dinosaurs reached their peak and then became extinct.
e. the first human-like apes appeared.
D
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How does a cell bind with a hormone molecule?
a. It increases its receptor levels. b. Cells circulate through the body looking for hormones to which they can bind. c. Molecules in the cell membrane have a binding site that matches a binding site on the hormone. d. It decreases its receptor levels.
Four of the five answers listed below are characteristics of most veins. Select the exception
a. blood volume reservoir b. contain valves c. low resistance-transport tubes d. oxygen-rich blood e. low blood pressure
The sex chromosome composition of a person with Klinefelter syndrome is most accurately written as
a. XXX. b. XO. c. XXY. d. XYY. e. YO.
A cell is called ________ if it has the ability to form any body tissue or even an adult animal.
Fill in the blank(s) with the appropriate word(s).