<span>Actually the reticular layer is the one biologically which is the deeper layer of the dermis, which supplies oxygen and nutrients to the skin, which contains blood vessels and sweat glnads along with fat cells, and hair follicles and lymph vessels , with oil glands.</span>
Answer:
ensures high level of competition
There are five mechanisms involve in diversity of organisms:
genetic drift, mutation, natural selection, gene flow and non random mating.
Explanation:
Genetic drift: It is a mechanism in which frequency of the allele changes within a population due to random sampling. It causes decrease in diversity in organism and can result in new species.
Mutation: Mutation in the genes is the most important reason of diversity.the change in DNA causes introduction of new alleles. Harmful mutations do not le species evolve by delimiting them from reaching sexual maturity.
Gene flow: The allele flow happens when a new gene is introduced into a population either by immigration or random mating. when two populations of same species share genes, variation occurs.
Natural selection: The favourable traits for survival are transferred to the offspring. It allows them to adapt better to the environment. It allows maintenance diversity of organism.
Non random mating: The mating between the individual with varied genotype will result in genetic variation.
One of the birth control which could also be classified as ineffective which describes the statement above is the withdrawal or also known as the pulling out method. This is also describe as ineffective because sometimes the pair who is performing the intercourse, in which the male will sometimes not realize that he has already ejaculated. This is one of the birth control method being used instead of using contraceptives.
