What is the process that eventually leads to the death of a plant?
A. perennial
B. abscission
C. outcrossing
D. dichogamy
E. senescence
Answer: E
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The simultaneous movement of Na+ out of a cell against its concentration gradient and protons into a cell with their concentration gradient is best described as an example of
a. symport. b. passive diffusion. c. antiport. d. facilitated diffusion. e. active transport
In order to be successful, chemotherapy drugs have to stop cell division. The most likely method for this would be to ________
A) denature all the enzymes in the cell so division can't occur B) speed up the cell cycle in the cancerous cells C) stop cellular respiration so the cancerous cells don't have energy D) interfere with the function of the spindle fibers
A requirement of cladistics is that a grouping must include ________
A) species that can interbreed B) only living species C) species with shared traits D) a common ancestor and all its descendants
The artificial selection of different breeds of dogs is an example of speciation.
a. true b. false