The difference between the per capita birth rate and the per capita death rate is the ____
a. per capita growth rate
b. per capita population curve
c. intrinsic rate of increase
d. geometric population curve
e. exponential population curve
ANSWER: a
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You add an unknown phage to a mixture of F+ and F- cells of E. coli and plate out the bacteria. The bacterial colonies that grow are all F-. How can you explain this phenomenon?
A. The phage bound to a receptor on the sex pilus, and therefore only infected the F+ cells (leaving the F- cells alone). B. The phage bound to a receptor on the F- cells, leaving only them alive and allowing the F+ cells to die off. C. The phage integrated (lysogenized) the F- cells, giving them a selective advantage over the F+ cells. D. F+ cells are uniquely susceptible to phage attack for unknown reasons.
Which plant is consumed by more people
worldwide than any other plant?
a. wheat b. corn c. rice d. potatoes e. legumes
In estimating risks for genetic counseling, one parent with an autosomal dominant and two parents
heterozygous for recessive conditions are considered to be ____________________. Fill in the blank(s) with the appropriate word(s).
Chickenpox and (herpes/shingles/warts) are caused by the same virus
What will be an ideal response?