Answer:
Genetic continuity is maintained by the Replication or Synthesis phase and the Mitosis phase of the Cell cycle.
Explanation:
- The Cell Cycle can be divided into the following phases,
- G0- Interphase.
- G1 - Growth phase.
- S - Replication or Synthesis phase.
- G2 - Second Growth phase.
- M - Mitosis.
- Of all the above phases, in the S phase the replication or doubling of the genetic material, that is, the DNA, occurs for equally distributing the genetic material to both the daughter cells.
- The M or the Mitosis phase is also essential to ensure that the distribution of the genetic material occurs accurately among the daughter cells.
- Hence, a genetic continuity is maintained across the generations of the cells.
Geological timeline is the chronological dating of the organisms and the geological happening in the orderly manner of the years and dates. The oldest mammals lived 200 million years ago.
<h3>What are the different species that arrived in the geological timelines?</h3>
5 million years ago humans arrived, 200 million years ago first mammal organism, 1.5 billion years ago complex single-celled organisms and 4.5 billion years ago Earth was formed.
The geological timeline is important as it portrays the presence and arrival of the organisms and the formation of some of the structures.
Therefore, mammals arrived at option B. 200 million years ago.
Learn more about the geological timeline here:
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High CO2 levels cause plants to thicken their leave ,which could worsen climate change effect researchers says.
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