Key is to lock as D. Substrate is to active site.
Answer:
B. The horse and donkey are not members of the same species because their offspring are sterile.
Explanation:
The horse and donkey aren't members of the same species since the donkey has 62 chromosomes while the horse had 64 chromosomes and members of the same species need to have the same number of chromosomes. This leads to the mule having 63 chromosomes which is an odd number of chromosomes so it is sterile.
Therapeutic cloning is the
process of creating multiple copies of a cell to treat a disease. In this type of cloning, the nucleus of a
cell, such as a skin cell, is inserted into a fertilized egg whose nucleus has
been removed. The nucleated egg begins to divide repeatedly to form a
blastocyst. Stem cells are then extracted from the blastocyst and they are used
to grow cells that are a perfect genetic match for the patient. The cells
created through therapeutic cloning can then be transplanted into the patient
to treat a disease from which the patient suffers.
