An endangered species
a) may soon become extinct over all or most of its range
b) may eventually become threatened or rare
c) may be considered economically important but rare
d) is one that is evolving into another species
e) is one that may become rare in the next 100 years

A.) May soon become extinct over all or most of its range

Explanation:

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.

answer: b: experiments that showed that all cells are similar in how they metabolize and in their composition

explanation: