A large asteroid or comet impacted the earth.
Answer:
Duplication is a type of mutation that involves the production of one or more copies of a gene or region of a chromosome. Gene and chromosome duplications occur in all organisms, though they are especially prominent among plants. Gene duplication is an important mechanism by which evolution occurs.
Phylum is a principal taxonomic category that is ranked below the kingdom and above the class. If two organisms are in the same phylum, this means that they are also in the same kingdom. Each phylum is composed of one or more classes.
Answer:
B
Explanation:
Tolerable Upper Intake Level is the nutrient individuals in a group of the same age can take daily in an unquantifiable amount because it has no inimical effect
