In conifers, the time between pollination and
fertilization is
a. just a few hours.
b. about a day.
c. about a month.
d. about six months.
e. a year or more
E
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A chemical substance that behaves as a natural
analgesic is a. an amphetamine. b. LSD. c. epinephrine. d. an endorphin. e. none of these.
People who have a single X chromosome are female, while those with XXY sex chromosomes are males. In order to be a female a human
A. must have two X chromosomes. B. cannot have a Y chromosome. C. must have only one X chromosome. D. must have only one Y chromosome. E. cannot have an X chromosome.
The cell formed by the union of egg and sperm during fertilization is the ________
Fill in the blank(s) with correct word
A few species of actinomycetes have been found to be pathogenic in humans, other animals, and plants.
Answer the following statement true (T) or false (F)