Mechanisms that evolved in plants to regulate the rate of water loss do not include
A. becoming dormant during dry times of the year.
B. losing leaves.
C. producing leaves that are thick and hard.
D. containing stomata in crypts or pits.
E. increasing the number of water vacuoles in the cells.
E. increasing the number of water vacuoles in the cells.
Increasing the number of water vacuoles would provide water storage for cells but would not prevent water loss via transpiration.
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What are some of the changing things in our current world that the author claims we are not well adapted to yet?
A. Computer screens B. Junk food C. Sterile environments D. 24 hour schedules E. None of the above (A-D) F. Some of the above (A-D)
A shift in moth frequency from more light and
less dark to more dark and less light is an example of what type of selection?
a. stabilizing b. directional c. disruptive d. frequent e. mutational
In the process of ß-oxidation, ____ are converted to ____
a. acetyl CoA; omega-3 fatty acids b. acetyl CoA; ketone bodies c. LDLs; HDLs d. fatty acids; acetyl CoA e. HDLs; LDLs
The genetic material of some viruses, such as HIV, is not DNA but is instead
A) carbohydrate. B) lipid. C) RNA. D) protein.