The increased variability in the frequency of the b+ allele in the smaller flour beetle population in the graph above is
an example of ____.
a. genetic drift
b. gene flow
c. the founder effect
d. a fixed allele
e. a dimorphic trait
ANSWER: a
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The apprentice in your horticulture lab accidentally trims all of the axillary buds from a particularly prized specimen. After realizing his mistake, he rather glumly asks you, as lead horticulturalist, about the effects on the plant. You predict that
A. the plant will die rapidly from this loss. B. the plant will regrow the lost buds. C. the plant will continue its vertical growth and will be a tall and skinny variety. D. the plant will continue its horizontal spread and will be a wide but short variety.
Black widows spend their entire lives in their cobwebs, sitting and awaiting predators. When a
prey item stumbles into their web, they rush out quickly to subdue it but tend to fatigue quickly and cannot maintain high levels of activity for long periods. As a result, ____________________.
a. they have mostly fast-twitch muscles b. their muscles have high levels of myoglobin c. they need a constant supply of oxygen for fast contractions d. actin and myosin function without calcium
Recount the evidence that Dolly the sheep was indeed the product of cloning, or cell fusion
What will be an ideal response?
These epithelial cells function in secretion or absorption and are found in many glands and in the kidney tubules: ________
A) cuboidal B) stratified C) squamous D) columnar