A plant that flowers in the second year of life is a(n)
a. annual.
b. biennial.
c. perennial.
d. annual or biennial.
B
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Atomic force microscopes use a scanning probe that maintains a fixed distance from the surface of the specimen. It is useful for specimens that
A. do not conduct electricity well. B. have extremely uneven surfaces. C. both do not conduct electricity well and have extremely uneven surfaces are correct. D. neither do not conduct electricity well nor have extremely uneven surfaces is correct.
The first self-replicating molecule hypothesized to have formed on Earth was ________
Fill in the blank(s) with correct word
The energy you use in voluntary muscular activities such as work and sports, plus the amount of energy required to digest and assimilate your food, is called
A. total Calories used. B. muscular energy expended. C. BMR. D. specific dynamic action.
Do all organisms fit equally well under the biological species concept? Explain.
What will be an ideal response?