Dna extraction is a useful technique for scientists because it can be used a. to see the nuclei of cells b. to absorb viruses c. to verify a person’s personality d. to determine if people are related

DNA comprises the genetic makeup of every organism. It carries genetic information that is used by the organs in the body to determine what functions to carry out.

DNA cannot be used to see the nuclei of cells or absorb viruses. A person's personality cannot be determined from DNA.

The answer is D. to determine if people are related, as DNA between two people can be compared for similarities of code between the two.

succession returns a disturbed

ecosystem to a more stable state. this is also classified into two (2) types:

primary succession and secondary succession. the primary succession arises when

a new land is transformed and a bare rock has been exposed providing an environment

that can be occupied for the first time. while, secondary succession occurs

when a previously occupied environment was disturbed that kills much of all its

community

explanation:

organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.