The following are all true about the life cycle of mosses except
A) external water is required for fertilization.
B) flagellated sperm are produced.
C) antheridia and archegonia are produced by gametophytes.
D) the gametophyte generation is dominant.
E) the growing embryo gives rise to the gametophyte.
Ans: E) the growing embryo gives rise to the gametophyte.
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The small, non-protein molecules that can be readily separated from an enzyme and are responsible for transfer of atoms from one molecule to another are referred to as
A. vitamins. B. enzymes. C. hormones. D. coenzymes.
Dental pathogens are called ________.
Fill in the blank(s) with the appropriate word(s).
The bacteriophages used in Alfred Hershey's and Martha Chase's experiments showed that:a
DNA was injected into bacteria. b. DNA and protein were injected into bacteria. c. DNA remained on the outer coat of bacteria. d. proteins were injected into bacteria. e. proteins were responsible for the production of new viruses within the bacteria.
Some ribosomes are suspended in the cytosol of a cell, whereas other ribosomes ________
A) make proteins inside the nucleus B) are found on the plasma membrane C) are attached to the smooth endoplasmic reticulum D) are attached to the outside of the nucleus