The 2 is the subscript for H symbolises the presence of 2 Hydrogen atoms.
<span>Transport across the cell membrane that requires the use of energy in the form of ATP is called "Active Transport"
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Answer:
genetic drift
Explanation:
Genetic drift is an evolutionary force that requires the presence of a small population. It is a random process that fixes one or other alleles randomly in the gene pool of a population. Genetic drift does not take account of survival fitness imparted by alleles to the individuals. Since random and chance events such as the death of all the individuals having a certain allele in a population affect the small population more intensely, genetic drift works on small populations only.
