Answer:
The most recent common ancestor of all currently living organisms is the last universal ancestor, which lived about 3.9 billion years ago. ... 6,331 groups of genes common to all living animals have been identified; these may have arisen from a single common ancestor that lived 650 million years ago in the Precambrian.
Answer:
lack of oxygen
Explanation:
Just like us humans, plants also need oxygen to live
<span>Parents can pass on chromosomes to their children that are different than their own when the new gene combinations are created by crossing over. The exchange of genetic material between homologous chromosomes is known as crossing over which occurs in meiosis. When homologous chromosomes pair up and exchange different segments of the genetic material. As the result, a new combination of genes will be formed. If there was not crossing over, all genes on a chromosome would be inherited together.</span>
<span>Dolly, a female domestic sheep, was the first mammal to be cloned from a fully differentiated cell, using the process of nuclear transfer the nucleus of a ____somatic cell _________ is transferred into a cytoplasmic donor.
The answer is somatic cell </span>
