Answer:
Mass extinction is when biodiversity or species in a living habitat decreases to about three-fourths of its original number or to none. Such an event is identified by a sharp change in the diversity and abundance of multicellular organisms. It occurs when the rate of extinction increases with respect to the rate of speciation. Mass extinctions are usually associated with organisms that are macroscopic rather than microscopic. Examples of mass extinctions are Permian extinction of marine species, and Cretaceous extinction of various species, including dinosaurs.
Several factors affect the rate at which enzymatic reactions proceed - temperature, pH, enzyme concentration, substrate concentration, and the presence of any inhibitors or activators.
Answer:
Explanation:
Lethal mutations are mutations that are deleterious, its presence in an individual brings about the death of such individual.
Insertion or deletion this a mutation caused by the addition or deletion of a nitrogenous base leading to a shift in the reading frame and a formation of new bases sequence.
Indel mutations can be beneficial at times resulting into variations that is important in an individual. This variation can be explored and use for research.
