Frameshift mutations such as the substitution or deletion of a base can alter the entire DNA base sequence after the point where the base was substituted/deleted, this it causes the triplets to code for different amino acids which in turn results in the sequence of amino acids changing.
As the primary structure (amino acid sequence) changes, this causes the secondary and hence tertiary structure to change as well, causing the protein to become dysfunctional.
In comparison to point mutations which include silent, inversion, etc mutations, these mutations may cause only a single amino acid to either stay the same or change as a tiny region of the DNA base sequence is altered slightly, unlike frameshift mutations which may cause a huge portion of the DNA base sequence to be altered.
The correct answer is the species <span>whose absence would cause major disruption in a community.
The keystone species are the ones that are ''keeping the ecosystem together''.
They might not be the most abundant species or a species on the top of the food chain, but they are the ones that have the strongest effect on the ecosystem.
The keystone species can have this role because they present an important link in the food chain, their presence changes an aspect of the habitat, they introduce a new resource in the ecosystem etc.</span>
The correct option is B.
Ground water refers to those water sources that are found underneath the ground in rocks, sand and soils. The quantity of ground water that were utilized during the pre-industrial period is very small compare to the amount that is utilized during the industrial time. And this has led to a significant decrease in the amount of ground water available today. Other factors that had led to shortage in ground water include pollution and lack of precipitation.