Directional selection is a type of natural selection that favors one extreme phenotype over the mean or another extreme. Examples of directional selection include giraffes that have long necks and the darkening of London's peppered moths after the Industrial Revolution.
Stabilizing selection, also known as purifying selection, is a type of natural selection in which genetic diversity decreases as the population stabilizes on a particular trait value. An example of stabilizing selection is birth weigh in humans.
Disruptive selection is a type of natural selection that shows a preference toward the reproduction of genetic material at the extremes within a population.One of the most studied examples of disruptive selection is the case of London's peppered moths.
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Answer:
there must be large numbers of free amino acids present in the cytoplasm
Explanation:
<em>In order for translation to occur, </em><em>there must be a large number of free amino acids in the cytoplasm.</em>
<u>These free amino acids are usually carried by the transfer RNA which also carries the corresponding mRNA codon.</u>
During translation, as the codons in the mRNA match their complements in the tRNA, the amino acid being carried by the tRNA is released and a peptide bond is formed between subsequent amino acids until the required polypeptide bond is formed.
Translation and transcription only occur simultaneously in prokaryotic cells where there is no barrier between the cell's genetic materials and the cytoplasm, unlike in eukaryotic cells where the genetic materials are housed in the membrane-bound nucleus.
Answer:
Biome- A group of ecosystems with similar climate, vegetation, and wildlife
Ecosystem- All living and nonliving things in an area
Organism- A complete living thing
Community- All living things in a particular area
Population- A group of organisms of the same species in an area
