Mutation is the primary cause of all genetic variation. Mutation is important as the first step in evolution, as it produces a new sequence of DNA for a particular gene, producing a new allele. Recombination, through intragenic recombination, may also generate a new DNA sequence (a new allele) for a particular gene.
Answer: Negatively charged ions are called anions.
<span>The amount of genes we have is considered an estimation. They
used to believe it was around or above 100,000. Then when the human genome project (HGP)
was completed in 2003 their estimation brought it down to 20,000 to 25,000. You
can find their current work at “national human genome research institute” and
also a free public database. </span>
The statement that is not true regarding the immune system and homeostasis: 'The immune system is an independent system which does not interact with other organ systems'.
The immune system includes organ systems as well as processes of the body that enables an individual to resist and combat infections and toxins produced by various pathogens. The immune system encompasses organs such as the thymus gland, bone marrow as well as lymph nodes.
The white blood cells or lymphocytes are responsible for fighting infections in the body and lymph or lymphatic fluid carries these cells in the body from one place to another. Lymph nodes act as a filter for the lymphatic fluid.
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