The sum of all gene copies at all gene loci in all individuals in a population defines a ____
a. ploidy level
b. genome
c. polymorphism
d. gene pool
e. genetic database
ANSWER: d
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Select the pair in which the nitrogenous waste is INCORRECTLY matched with the benefit of its excretion.
A. urea: low toxicity relative to ammonia B. uric acid: can be stored and excreted as a precipitate C. ammonia: very soluble in water D. uric acid: minimal loss of water when excreted E. urea: very insoluble in water
Active transport pumps typically move solutes
from ____ to ____ fluids.
a. hypertonic - hypotonic b. hypotonic - hypertonic c. isotonic - hypotonic d. hypertonic - hypertonic e. hypotonic - hypotonic
Which of the following is the main site of photosynthesis in a typical leaf?
A) epidermis B) endodermis C) mesophyll D) xylem
A flower that lacks any one of its floral parts might be called
A. fatally flawed. B. incomplete. C. mostly complete. D. misrepresented. E. misinterpreted.