Answer:
Animalia
Explanation:
This is the animal kingdom, and animals do not have cell walls, only cell membranes. All other mentioned kingdoms do or might have cell walls.
Xenografts are tissue grafts harvested from a different animal species.
Answer:
B. The ddNTPs lack a 3′ hydroxyl group.
Explanation:
Dideoxynucleotides is a family of inhibitors of the DNA polymerase, its official name is 2',3' dideoxynucleotides but they are commonly called ddNTPs. One of the main characteristics of this compound is the absence of the 3'-hydroxyl group in the deoxyribose, due to the absence of this group, it is impossible to form a phosphodiester bond between nucleotides and the DNA synthesis is stopped.
The red blood cells were placed into an isotonic solution. Water moved into and out of the cells to maintain homeostasis.