Bone marrow transplants are given to patients who cannot make their own blood cells. the transplant gives a patient stem cells. what best explains what is happening when the patient receives the transplant? a. transplanted cells change bacteria into blood cells. b. germ cells cause a release of blood cells. c. bacterial cells produce a toxin to make more blood cells. d. cells that have an undefined role develop into blood cells.

Option D

Explanation:

Bone marrow transplantation are given to the patients that cannot make their own blood cells.

In case of severe disease where there is a problem in the production of bone marrow cells in the body. In case of leukemia bone marrow transplant is one of the most effective way to treat it.

The cells that have no pathway predefined for differentiation, develops into a blood cells.

hence, the correct answer is option D  

the answer for apex is "1 and 6"

one is through turgidity. this occurs before ground tissue ( collenchyma

and sclerenchyma cells) become well

developed to give structural support to the plant as it grows bigger. the xylem

tissue (composed of rigid tissue) of the young

plant render this support and also maintaining osmotic turgidity of the surrounding

plant cells.