Answer:
directional selection
Explanation:
The directional selection is a type of Darwinian selection where a particular phenotype is favored in the population, thereby modifying the allelic frequencies to increase the proportion of the favored phenotype. <em>Biston betularia</em>, also known as peppered moth, is a species that was influenced by directional selection in its recent past. Before the industrial revolution, the frequency of light-colored moths was predominant compared to the darker-colored phenotypes, because this color has higher adaptive fitness in a clean, no pollution environment, thereby light-colored moths were able to avoid predatory birds. However, during the industrial revolution, the frequency of dark-colored moths increased in response to pollution (i.e. darker environment), thereby conferring a higher adaptive fitness to darker phenotypes.
Answer:
The genetic code only consists of 4 letters of A T C and G. That means it is a VERY simple language. Combinations of three of these letters (codons) are translated into functional information in the form of amino acids. Each three letters = one amino acid.
Although the code seems simple, the information that can be derived from it is highly complex, making an entire organisms.
Take for example a simple 4 letter sequence of letters. ACTG, AGTC, AATG, etc. There are 256 potential combinations, just in a sequence of 4. Imagine in humans where there are THREE BILLION letters! The possible combinations are essentially endless.
One is a and two is a as well
The stage that land gets ready for the arrival of new species is migration.
