Answer:
<h2><u>
directional selection</u></h2>
Explanation:
This type of natural selection is referred to as . In this type of natural selection, either one phenotype is preferred or the other; therefore, there is no equilibrium between the populations of the phenotypes that are present.
Examples of organisms that have undergone directional selection are black bears during the ice ages, African chichlid and sockey salmon.
Answer:
<em><u>A</u></em><em><u>:</u></em><em><u> </u></em><em><u>crust</u></em>
<em><u>B</u></em><em><u>:</u></em><em><u> </u></em><em><u>mantle</u></em><em><u> </u></em>
<em><u>C</u></em><em><u>:</u></em><em><u>core</u></em><em><u> </u></em><em><u>explanation</u></em><em><u> </u></em><em><u> </u></em><em><u>may</u></em><em><u> </u></em><em><u>it</u></em><em><u> </u></em><em><u>help</u></em><em><u> </u></em><em><u>u</u></em><em><u> </u></em><em><u>buddy</u></em><em><u> </u></em>
The genetic code is said to be redundant in that the same amino acid residue can be encoded by multiple, so-called synonymous, codons
Answer:
Because of the UV radiations from the sun causes the damage to the DNA of the skin cells causing the formation of pyrimidine dimers and also causing inflammation and immune suppressiosn resulting in the formation of melanoma.
Explanation:
The main cause of skin cancer (melanoma) is too much ultraviolet radiation from the sun or the sunbeds.
The carcinogenic , inflammatory , immunosuppressive and DNA damaging properties of ultraviolet radiations contribute to the initiation , progression and metastasis of primary melanoma.
Melanoma usually occurs due to excessive exposure to the UV radiations in the sunlight resulting in awry in the melanin producing cells (melanocytes) that give color to the skin.
