DNA replication is the process that leads to the formation of the two chromatids.
DNA REPLICATION:
- DNA replication is the process by which the information in a DNA molecule is used to synthesize another to make two identical copies.
- DNA replication occurs prior to every cellular division in order to enable daughter cells have the correct amount of genetic material.
- DNA molecules are borne on structures called chromosomes. Hence, when the information of a DNA molecule is duplicated, there is need for another chromosome to harbor the replicate.
- Chromosomes containing identical DNA molecules are termed sister chromatids. Sister chromatids are joined together by a centromere.
- Therefore, DNA replication is the process that leads to the formation of the two chromatids.
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The immune response is the body's defense mechanism against the pathogens. The immune response of the body protects it from bacteria, viruses and multiple other disease causing organisms. The normal development of this protective immune response of the body is produced by as a result of the hormones which are produced by the thymus gland. The thymus gland produces the T-lymphocytes, which are important for a healthy immune response. The thymus gland secretes thymosin which is crucial for the development of these cells.
Hence, the answer is 'thymus gland'.
Answer:
I think b
Explanation:
I think b I am not so sure
