Which of the following is a benefit of using fossil fuels? A. Fossil fuels provide cheaper energy.
B. We have very efficient means of using fossil fuels currently.
C. We already have infrastructure in place to make use of fossil fuels.
D. Fossil fuels provide cleaner energy.

Explanation:

A ) Fossil fuels provide cheaper energy

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during the process of dna replication, brdu can replace thymidine and incorporate into the newly synthesized dna, cell proliferation thus can be reflected in the extent of brdu incorporation.

c) 50% there are four chromosomes. after crossing over, 2 of the four have been changed. that means any gamete has a 2 in 4 chance or 50% chance of receiving the mutated chromosome.