Which number identifies a structure that is composed of polysaccharides?
a. 1
b. 3
c. 6
d. 7
e. 9
C
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Which of the following comparisons of oviparity and viviparity is incorrect?
A. In viviparity, the mother has a lower metabolic investment in her young than in oviparity. B. Viviparity occurs in most mammals; oviparity occurs in birds. C. In viviparity, fertilized eggs are retained within the mother; in oviparity, the fertilized eggs are released into the environment. D. In viviparity, there is parental care; there is no parental care in oviparity. E. In viviparity, the fertilized egg does not need protection from dessication; in oviparity the fertilized egg often needs protection from dessication.
Which structure delivers a signal from the motor neuron to all the sarcomeres of a muscle cell?
A) myosin filament B) filaments-line C) T tubule D) sarcoplasmic reticulum
The mechanism of action of the antibiotic vancomycin is
A. inhibition of protein synthesis. B. inhibition of cell wall synthesis. C. inhibition of nucleic acid synthesis. D. inhibition of a metabolic pathway. E. disruption of cytoplasmic membranes.
Consider a human illness in which individuals that are homozygous for a deleterious recessive allele suffer from a disease with a selection coefficient of s = 0.85. At equilibrium, the nondeleterious allele has a frequency of 0.95
What is the mutation rate from the healthy allele to the deleterious allele? What will be an ideal response?