From the figure below, one can assume that base substitution rates are generally ________ in bacteria and vi-ruses relative to eukaryotes
a. higher
b. lower
c. the same
d. deleterious
e. beneficial
A
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Cells require iron supplemented in their growth medium as a trace metal, because it is consumed by quinones during electron transport for ATP production
Indicate whether the statement is true or false.
Four of the five choices listed below are
characteristics of phloem. Select the exception. a. consists only of cell walls b. characterized by channels across plant cell walls c. sieve plates found between some cells d. includes accessory companion cells e. transports sugar
In female gamete development in humans and other vertebrates, the net result of meiosis is the production of one large egg and three small cells with very little cytoplasm. These three small cells:
a. degrade almost immediately. b. fertilize the egg. c. divide to form secondary egg cells. d. fuse together to form the placenta. e. act to nurse the egg cell.
Cells are composed of chemicals and both the structure and function of cells are regulated by the basic principles of chemistry
Indicate whether the statement is true or false.