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.
Answer and explanation
1. Cloning differs from budding as it generates a genetically identical COPY of a cell or organism while budding produces a genetically identical offspring.
2. Firstly it can take place quickly, allowing the pioneer species to establish themselves in their new habitat, out competing slowly -reproducing species.
Secondly since all the offspring are genetically alike, it ensures that if the parents are successful in their habitat, the offspring will also be successful, provided environmental conditions do not change .
3. Plant cloning uses one of the plant organs can be roots , stem and etc ..while animal cloning only uses a single cell
B. Because virus need the hosts dna to multiply
