A caterpillar turning into a butterfly is an example of
A. direct development.
B. indirect development.
C. external fertilization.
D. internal fertilization.
E. reproduction.
B. indirect development.
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Which of the following does not contribute significantly to DNA damage?
A. deamination due to hydrolysis B. alkylation of bases C. deamination due to superoxide radicals D. oxidation by hydroxyl radicals E. oxidation by hydrogen peroxide (H2O2)
Leaching is
A) the movement of solutes through soil. B) the breakdown of parent material. C) the gain of cations. D) the loss of leaves from a plant.
Insertion of a thin tube through the vagina into the uterus to sample fetal tissue is called ________
Fill in the blank(s) with correct word
The creeping horizontal and subterranean stems of ferns are referred to as
a. prothalli b. fronds c. stipes d. roots e. rhizomes