Answer:
The correct answer is A. technology.
Restriction enzymes are the class of enzymes used to create a nick in DNA strand. They cleave the DNA at or near a specific base sequence which is called as restriction site.
It leaded to the advancement in recombinant-DNA technology. Restriction enzymes made it possible for the scientists to make a recombinant DNA at that time. These enzymes help in creating the nick in a DNA at the desired position as well as in the production of sticky ends. At this desired position, the scientist then inset the gene of interest.
Recombinant-DNA (rDNA) technology enabled the scientists to produce insulin, penicillin, genomic libraries etc.
Answer:
Unsaturated zone: The area between the soil-water belt and the water table where pore spaces are not saturated with water. Saturated zone: The zone of rock below and including the water table where pore spaces are completely filled with water.
Explanation:
Thick body fat layers.
The temperature remains low and there is a decent amount of precipitation. With both of those in mind, we can assume the climate is from a cold, possibly snowy area.