Stem cell research has been a controversial subject in past years. what is the reason for this?
a: cells for study are often taken from human embryos.
b: stem cell techniques will not accomplish the intended purpose.
c: replacement tissue will never be grown from a person's own stem cells.
d: the cells cannot be isolated.

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?

Which organelles are labeled d, and what is one feature that distinguishes them from the other labeled organelles chloroplasts the only organelles that produce sugars from sunlight mosomes, only found in animal and bacterial cells centricles only found in animal cells mitochondra, the only energo-generating structures found in cells

Patient has just received an organ transplant which treatment would be most effective in preventing the patient’s body from