The CRISPR system allows biologists to alter the nucleotide sequence of specific genes. Which of these tasks could theoretically be achieved by applying the CRISPR system instead of other techniques of genetic engineering?

A. transferring a functional gene from one organism to another
B. deactivating a disease-causing gene
C. replacing a defective gene with a normal gene
D. determining whether two DNA samples came from the same source

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

the answer is c most of the fortnite players usually buy v bucks to get the battle pass and other cosmetics but some players who are referred to as "no skins" don't   buy skins and are usually noobs.

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a = executive branch; b = judicial branch