Which of the following was critical for the adaptation of reptiles to terrestrial ecosystems?
a. the amniote egg d. endoskeleton
b. protective mechanisms e. A and C
c. exoskeleton
A
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Indicate whether this statement is true or false.
____________ is the process by which living organisms are formed from simple organic molecules. Fill in the blank(s) with the appropriate word(s)
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a. convergence b. divergence c. rain d. none of these
In Las Vegas, Nevada, the groundwater supply is ________
A) being depleted B) increased C) not being used and staying the same D) being used and staying the same E) about to be tapped as soon as Lake Mead runs dry