Four of the five answers listed below are
principal characteristics of all chordates. Select
the EXCEPTION.
a. tail
b. bony vertebra
c. notochord
d. nerve cord
e. pharyngeal gill slits
B
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Small circular pieces of bacterial DNA that are used as vectors in cloning experiments are called _____
A. phages B. viruses C. plasmids D. chromosomes
For a particular gene, the frequency of the dominant allele H is 0.65. The total population size is
10,000 individuals. Also, the homozygous recessive condition results in living but sterile offspring. Fill in the table of values for the generations indicated:Generation p q p2 2pq q2 1 2 Does this population exhibit Hardy-Weinberg equilibrium? Why or why not? If not, what assumptions does the Hardy-Weinberg principle make that appear to be inapplicable in this situation? What will be an ideal response?
All of the following are means of genetic recombination in prokaryotes EXCEPT
A. transformation. B. transduction. C. crossing over. D. conjugation.
Recent discoveries of microscopic fossils have extended the known history of life to about
A. 1 billion years ago. B. 2 billion years ago. C. 3.5 billion years ago. D. 4.5 billion years ago.