A gene has been discovered in a eukaryote that is identical to a gene of a bacterium that the eukaryote normally engulfs and digests. This is probably due to
A. horizontal evolution.
B. vertical evolution.
C. convergent evolution.
D. horizontal gene transfer.
Answer: D
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Every type of mollusc has a radula
Indicate whether the statement is true or false
Four of the five answers listed below are events associated with the aging process. Select the
exception. a. skin wrinkling b. increased metabolism c. decreased muscle mass d. altered collagen e. increased fat deposition
Which of these is the largest portion of the human brain, receives sensory input, and regulates voluntary motor output?
A. cerebellum B. thalamus C. diencephalon D. cerebrum
You are confronted with a box of preserved grasshoppers of various species that are new to science and have not been described. Your assignment is to separate them into species. There is no accompanying information as to where or when they were collected. Which species concept will you have to use?
A) biological B) phylogenetic C) ecological D) morphological