What is the minimum number of phage that can initiate the development of a plaque in a bacterial lawn?
A. 1
B. 5
C. 25
D. 10
Answer: A
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In the universal ABO blood grouping system, there are four phenotypes - A, B, AB, and O - which are determined by
three different alleles. The presence of three alleles in the ABO blood grouping system is an example of ____.
a. a polymorphism b. genetic drift c. the bottleneck effect d. a dimorphism e. the founder effect
The hormone __________ is indicated at “E.”
a. STH b. aldosterone c. oxytocin d. ADH e. none of these
Convex lenses can correct ________, also called farsightedness
Fill in the blank(s) with correct word
Which aquatic zone in a lake will have the highest nutrient levels and therefore the densest microbial populations?
A. the littoral zone B. the limnetic zone C. the profundal zone D. the benthic zone E. the sediment zone