Most of the energy used by humans comes from which one of the following sources?
A) solar energy
B) nuclear energy
C) fossil fuels
D) hydroelectric power
E) geothermal power
C
Biology & Microbiology
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If a person is choking, the __________ maneuver can be used to expel food from their trachea. Fill in the blank(s) with the appropriate word(s)
Biology & Microbiology
Mutations can create new alleles that
are beneficial to the organism's fitness. have no effect on the fitness of the organism. decrease the fitness of the organism. All of the choices are correct.
Biology & Microbiology
Cells use ________ to transfer DNA from one cell to another via conjugation.
A) fimbriae. B) pili. C) hami D) glycopeptides.
Biology & Microbiology
All animals perceive light using different forms of a pigment called retinal
Indicate whether the statement is true or false.
Biology & Microbiology