Answer:
RNA world hypothesis.
Explanation:
RNA is present as the genetic material in some viruses only. RNA is produced from the template DNA by the process of transcription and helps in the protein gene expression.
According to RNA world hypothesis, RNA is considered to be the first genetic material as it has the ability to store the genetic material. The oxyribose sugar makes the RNA more reactive than the DNA molecule. The RNA also has the ability to work enzyme known as ribozyme. Hence, RNA has the ability to store the information and acts as catalyst.
Thus, the answer is RNA world hypothesis.
Answer: Meiosis is a type of cell division in which a cell divides twice to produce four identical daughter cells each with a haploid number of chromosomes. The result of meiosis is four identical daughter cells each with half the number of chromosomes as the parent cell.
Explanation: There are basically two types of cell division: Mitosis and meiosis. Mitosis is a process in which a cell divides to produce two identical daughter cells each with the same number of chromosomes as the parent cell while meiosis is a process in which a cell divides twice to produce four identical daughter cells each with half the number of chromosomes as the parent cell. Meiosis occurs in sex cells or gametes (sperm and egg). This produces gametes with haploid chromosomes of chromosomes (23 chromosomes). Mitosis occurs in somatic or body cells resulting in cells with diploid number of chromosomes or 23 pairs of chromosomes or a total of 46 chromosomes.
Answer:
Explanation: New experimental data can lead to a better understanding of theories or can even disprove them.
