Each carbon atom can share pairs of electrons with as many as ____ other atoms
a. 2
b. 3
c. 4
d. 5
e. 6
C
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You are examining a human pedigree for a trait. You notice that an offspring can be affected even if neither parent is affected. This immediately tells you that the trait is:
A. dominant. B. recessive. C. epistatic. D. produced by multiple alleles. E. incomplete penetrance.
Glacier Bay in Alaska is a fjord whose lowlands were covered by glacial ice until around 230 years ago
As the glacier retreated, glacial till was exposed to plant colonization; remarkably (and fortunately for generations of ecologists), the location of the tip of the retreating glacier has been frequently documented since the late 1700's. This means that scientists have been able to develop a detailed timeline of the changes in the plant community, or _____ in Glacier Bay over time. A. ecological succession B. niche diversification C. niche divergence D. competitive exclusion E. none of these
A genomic library consists of fragments of all of the DNA:a
that occurs in one species. b. contained in one chromosome. c. that would be found in a typical cell of a particular organism. d. in a recombinant gene. e. that codes for functional enzymes in a typical cell of a particular organism.
Describe the steps involved in the action of a muscle spindle.
What will be an ideal response?