Asolid is a substance a. that has a fixed shape and volume. b. that is invisible. c. that has a changing shape and volume. d. that has no shape or volume.

Fixed shape and fixed volume

Explanation:

The first answer is correct I did this on odyssey and the answers are both fixed.

advantage of using stem cells in medical research:

1.       it provides medical benefits in the fields of therapeutic cloning and regenerative medicine.

2. it provides great potential for discovering treatments and cures to a variety of diseases including parkinson disease, spinal cord injuries, diabetes, alzheimer’s disease and many more.

3. limbs and organ could be grown in lab from stem cells and then used in transplant or treat illness.

for 8 am not sure maybe yes?

for 9 if it is asking if the male is more or less it would be less

hope i even just a little : )