7. What properties of a substance determine how that substance will react when
combined with other substances?
A its volume and color
Bits mass and density
Cits chemical properties
D its physical properties

ans.

dna fingerprinting is defined as a process that determines the dna characteristics of an individual. these dna characteristics are unique among individuals as their fingerprints, so it is known as dna fingerprinting.

steps of dna fingerprinting includes extraction of dna from sample, amplification of dna, restriction digestion of amplified dna, and then analysis of dna by gel electrophoresis, respectively.

thus, the next step performed by the scientist is 'to cut the amplified dna (obtained by polymerase chain reaction) by restriction enzymes that cleave the dna into fragments and their analysis.'

on island x the species needed to adapt because they were being subject to predators which didn't inhabit island y.