Answer:Genetic drift
Explanation:
This is the change in genetic composition due to the random sampling of the genes in the population
B the organ that turns into the shell of the animals
Answer:
DNA
Explanation:
DNA (deoxyribonucleic acid) is the genetic material of living organisms. ... DNA is also passed on at the level of organisms, with the DNA in sperm and egg cells combining to form a new organism that has genetic material from both its parents.
Meiosis does not occur in <span>archaea</span><span> or </span>bacteria<span>, which generally reproduce via asexual processes such as </span>binary fission<span>. However, a sexual process known as </span>horizontal gene transfer involves the transfer of DNA from one bacterium or archaeon to another and recombination of these DNA molecules of different parental origin.
Maintenance of the circadian rhythm is important because it helps keep the body's functions running normally.
Alteration of the circadian rhythm to a significant degree may lead to mood disorders including mild depression and seasonal affective disorder.
Abrupt shifts in routine such as shift change or travel resulting in jet lag can alter the sleep cycle and also environmental factors such as decrease in number of daylight hours. This can negatively impact the secretion of melatonin which induces us to sleep which will lead to less sleep and thus irritability and mood swings.
