A thick filament of muscle is composed primarily of the protein
A. pectin.
B. myoglobin.
C. hemoglobin.
D. actin.
E. myosin.
E. myosin.
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Suppose the protein specified by bicoid was injected into Drosophila embryos, so that a high concentration was present everywhere in the embryo. What might be the result of such an experiment?
A) The embryos would grow larger than normal. B) The embryos would show no development of posterior regions. C) The embryos would show no development of anterior regions. D) The embryos would halt their development.
All staphylococci are coagulase positive
Indicate whether this statement is TRUE or FALSE.
The genetic variability of a population is solely dependent on the generation of mutations
a. True b. False
Life originated on earth in which of the following distinct phases?
a. formation of small molecules containing carbon and hydrogen b. formation of self-replicating information-containing molecules c. development of a membrane enabling metabolism and creating the first cells d. None of the above is correct. e. All of the answer options are correct.