Around 40 million years ago
The earliest whales that we think were fully aquatic, that is, they never left the water, are found around 40 million years ago, during the middle Eocene. That means that the transition from terrestrial animals to fully aquatic animals took about 12 million years.
Answer:
C.
Explanation:
All living things are made of cells.
<span>Im giving you at least two: 1. The amino acid change has no effect on the protein, and it works like it should. 2. the change altered the shape of the protein, and it can no longer do what job it typically does. Hope this helps</span>
C) a lack of comeption hope I helped.
Answer:
The purpose of meiosis is to produce gametes, which are used for sexual reproduction.
The cell reduces its chromosome number in half via a series of complex events. These events are summarised into two main groups: Meiosis I and Meiosis II, with each group encompassing several different events.
One way is : 1) Meiosis; the end product is 4 genetically different haploid cells.
Explanation:
Gametes are haploid cells that have only one set of chromosomes. As opposed to Somatic cells which contain two sets of chromosomes (these are known as diploid cells).
In Meiosis I, crossing over occurs during the event known as Prophase I. Crossing over is the process where non-sister chromatids exchange genetic information with one another. The site where this occurs between the chromatids is known as the chiasma.
