The membrane of a resting neuron is most permeable to which of the following ions?
A. Cl-
B. Ca2+
C. Na+
D. K+
E. H+
D. K+
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Viruses are ______ -coated fragments of DNA or RNA.
Fill in the blank(s) with the appropriate word(s).
Karyotype analysis
a. is a means of detecting and reducing mutagenic agents. b. is a surgical technique that separates chromosomes that have failed to segregate properly during meiosis II. c. is a diagnostic tool to detect chromosomal mutations. d. substitutes defective alleles with normal ones. e. fits all of these descriptions.
Which of the following would constitute a species?
A. all the birds that live in Michigan B. all the mallard ducks in the world C. you as an individual D. the weeds in your yard
Figure 2.5 C
Which of the following is depicted in the accompanying figure?
A. Hydrogen atom B. Sodium atom C. Helium ion D. Chlorine ion E. Oxygen molecule