Answer:
A
Explanation:
The reason the deletion of a nucleotide can be a lethal mutation is that it causes a frameshift mutation. This is due to teh fact that the codon sequence on the DNA is shifted by a single nucleotide. Therefore, the codons will read differently downstream from the place the deletion happened. The amino acids coded for by these codons will change too. The translated proteins will be defective and the organisms will be adversely affected, phenotypically.
The fox is the tertiary consumer and eats the hare. If the hare population decrease so does the fox population
The statement 'artificial selection decreases the rate of natural selection and change within a population' describes how artificial selection can decrease a population's biodiversity. It is a human-driven process.
<h3>Artificial selection</h3>
Artificial selection refers to the human-driven process by which different organisms (either plants or animals) are selected in order to combine desired features in offspring.
In artificial selection, organisms are mated (crossed) in order to select the progeny having desired phenotypic traits.
This process (artificial selection) leads to a decrease in natural genetic variation (biodiversity), which may have negative consequences in the successive rounds of selection.
Learn more about artificial selection here:
brainly.com/question/26144922
Answer: An independent variable is exactly what it sounds like. It is a variable that stands alone and isn't changed by the other variables you are trying to measure.
Chemicals can make mutations by a number of mechanisms. Base
analogs are incorporated into DNA and mostly pair with the wrong base.
Alkylating agents, deaminating chemicals, hydroxylamine, and oxidative radicals
change the structure of DNA bases, thus altering their pairing properties.
Introducing agents wedge between the bases and cause single-base insertions and
deletions in replication.
