Answer:
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Explanation:
A codon is a sequence of nucleotide triplets of messenger ribonucleic acids, or deoxyribonucleic acid. The start codon is defined as the first codon of a messenger ribonucleic acid transcript that is being translated by the ribosomes.
The ability to initiate the right AUG codon determines the correctness of translation. In eukaryotes, this is accomplished by scanning mechanism. In the scanning mechanism, the ribosomal subunit attached to the five prime end of the messenger ribonucleic acid and inspects base to base for an AUG using complementarity with the anticodon of methionyl indicator transfer RNA as the key to identifying AUG.
The start codon always code for a modified methionine in bacteria and codes for methionine in eukaryotes. Alternate start codons are found in bacteria and eukaryotes . They are different from standard AUG codon and are initiated by a separate transfer ribonucleic acid. They are rare in eukaryotes but common in bacteria.
The best answer is the third option namely an enclosed nucleus.
One major difference between these two types of cells is that a prokaryote cell has no distinct nucleus enclosed with a membrane whereas in a eukaryote cell the genetic material, which is DNA, is packaged into chromosomes and found within a distinct nucleus that is enclosed with a membrane
Examples of prokaryotes are bacteria such as staphylococcus species found as commensals on the skin of man and Streptomyces soil bacteria from which the antibiotic streptomycin is derived.
Examples of eukaryotes are an amoeba, which is a unicellular protozoan that lives in water and a hepatocyte which is a liver cell in man.
The Himalayan rabbit's environment entirely determines the color of its coat.
<h3>How does the environment affect the coat color on the fur of a Himalayan rabbit? </h3>
The color of newborn Himalayan rabbits is either white or light grey. Beginning at the age of four weeks and ending at six months, coloring the coat is a process. The temperature of the environment affects the color of the coat, which grows darker in colder climates and lighter in warmer ones. The Himalayan rabbit's hair turns black when it is subjected to subfreezing conditions. That area's fur finally turned black. The rabbit's newly grown fur will be black in color if the white fur is removed and the animal is kept at a low temperature. Considering this, it is clear that temperature affects the expression of genes that control this organism's fur color.
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Bio-geographic isolation is the separation of part/a whole species due to either biological or geographical reasons.
Biological could be lack of food, or a more preferable source of food somewhere else, etc. Geographical could be rivers, oceans, mountains, etc.
During the process of ossification, an existing tissue is replaced by bone.
