Answer:
A
Explanation:
Due to ethical problems in using embryonic stem cells of killing a life, ipsc are used by reporgramming a adult stem cell by using appropriate molecular signals to 'reverse the silenced genes', reverting the adult stem cell back to being a multipotent or pluripotent stem cells.
Water, Sunlight energy, and CO2(carbon dioxide)
The correct answer is D. Sara suddenly became very ill; therefore, she went to see her doctor.
Syphilis is transmitted through sexual actions through small cuts, for malaria, it would have to be through mixing of blood from a contaminated source to a uncontaminated source.