An atom that is negatively charged because it has accepted an electron is a(n):

A. isotope.
B. monomer.
C. isomer.
D. ion.


Answer: D

Biology & Microbiology

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Select the best choice for statements 131–134 in reference to the

five classes listed below. a. Chondrichthyes b. Osteichthyes c. Amphibians d. Reptilians E 131. Members of this class are fully terrestrial except for reproduction. M 132. Members of this class have cartilaginous skeletons but also possess jaws. M 133. Some species of this class live in water but are not dependent upon an aquatic environment. D 134. Members of one unusual group may have been ancestors of amphibians.

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Which of the following is not a recessive trait in humans?

A. common baldness. B. red-green color blindness. C. mid-digital hair. D. albinism. E. sickle-cell disease.

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The entire set of DNA in a cell is an organism's

A.) karyotype. B.) chromatids. C.) genome. D.) pedigree.

Biology & Microbiology

Which of the following is a eukaryote involved in foodborne illness?

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Biology & Microbiology