Answer:
Because DNA molecules are extremely long.
Explanation:
DNA molecule is made up of only four types of nucleotides that are adenine, guanine, cytosine, and thymine. These four types of nucleotide encode all the information necessary for the formation and working of the entire organism because each DNA strand is as long as 2 meter which contains millions of base pairs.
The four nucleotides are arranged in the DNA strand with many different combinations which results in the formation of codons sequence that contains all the information about the cell. This long DNA is compressed several times to fit in the nucleus.
Some similarities include:
1) Both animals and plants are involved
2) involves at least 1 parent
Some differences include:
1) Reproduction involves the formation and fusion of gametes while asexual does not
2) asexuality often results in rapid production compared to sexual
The answer is A. They have a hydrocarbon backbone that can be chemically altered.
