Which of the following best describes scientific theory?

a.) it cannot be changed
b.) it explains very few observations
c.) it is basically speculation
d.) it may change

D.

Theories always change. That's why science always changes

step 1: replication fork formation.

step 2: primer binding.

step 3: elongation.

step 4: termination.

explanation:

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humans, along with other animals and plants, have linear chromosomes that are arranged in pairs within the nucleus of the cell. the only human cells that do not contain pairs of chromosomes are reproductive cells, or gametes, which carry just one copy of each chromosome.