Answer:
Like many biological molecules nucleic acids are polymers, long molecules formed of repeating units. With nucleic acids, the repeating unit is the nucleotide. A nucleotide consists of a five carbon sugar, a nitrogen containing base and a phosphate group.
Cell division is regulated by two major genes D. oncogenes, and tumor suppressor genes, which stimulate cell division and, inhibit cells.
Cell division is the technique by the way which a parent cell divides, whilst a mother cell divides into or greater daughter cells. cellular department commonly takes vicinity as a part of a bigger cell cycle. In eukaryotes, there are distinct sorts of cell division that take place.
Cell division is the manner wherein a parent cell divides, giving a push to 2 or greater daughter cells. it is a crucial biological method in every lifestyle. cell division is fundamental to all residing organisms and required for increase and improvement. As a crucial approach to reproduction for all dwelling matters, the cell department allows organisms to switch their genetic fabric to their offspring.
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Answer:
a. a portion of the population becomes isolated from the remainder of the population and experiences different selective pressures
Explanation:
This is an example of allopatric speciation Allopatric speciation is a form of speciation (formation of new species) that occurs as a result of geographic isolation. This means that a part of population becomes physically separated from the initial main population. There is no gene flow between these two populations and as a result the two populations reach a high level of genetic divergence. They can no longer interbreed which means they become two different species (speciation).
New populations evolve as result of mutation, genetic drift and natural selection.
For example, Galapagos finches are isolated from others by the ocean (geographic isolation). Because of the isolation, the finches don’t breed with one another. So, they developed unique characteristics and became endemic.
