A person working in a rice paddy in Asia becomes infected with the liver fluke by
A. swimming or wading in infected water, where the cercariae enter the skin.
B. eating infected fish that was undercooked or raw.
C. eating infected snails.
D. drinking water contaminated with eggs.
Answer: A
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Which of the following is not true about the G + C content percentages in DNA of organisms?
A. Similar G + C percentages only suggests relatedness if the two organisms are also alike phenotypically. B. Organisms with different G + C percentages have dissimilar base sequences. C. Organisms with similar G + C percentages have similar base sequences. D. All of the choices are correct.
Members of the lineage ____ are called lancelets. As adults they live mostly buried in the sand in
warm, shallow marine habitats, but they do have well-developed segmented muscles and can move.
a. Petromyzontoidea b. Placodermi c. Cephalochordata d. Urochordata e. Myxinoidea
In evolutionary terms, an organism's fitness is measured by its _______
A. mutation rate B. health C. contribution to the gene pool of the next generation D. genetic variability
____________________ is an inherited disorder in which cysts form in the kidneys. Fill in the blank(s) with the appropriate word(s)