Four of the five answers below are correct statements about gymnosperm reproduction. Select the exception
a. Pollen grains mature into mature male gametophytes.
b. Sperm in gymnosperms are not flagellated.
c. Sperm reach egg cells through a pollen tube.
d. The zygote develops into a mature seed.
e. Seed cones and pollen cones develop on separate trees.
e
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Which of the following is a product of the citric acid cycle?
a. ADP b. NADPH c. carbon dioxide d. water
The most abundant class of antibody in the body, what antibody can function by neutralization, agglutination, opsonization, complement activation, and enhancement of natural killer cell activity?
A) IgM B) IgE C) IgG D) IgD E) IgA
The total number of named species is about
A) 160. B) 1.6 billion. C) 160,000. D) 1,600. E) 1.6 million.
A mutation that does not threaten the individual's survival is called ___ ___.
What will be an ideal response?