60. Stem Cells: The Body's Building Blocks

According to the passage, what is the main characteristic that makes stem cells special?
1. They are only found in embryos and bone marrow.
2. They can divide and create more stem cells very quickly.
3. They can become many different types of cells in the body.
4. They are the only cells that can be used to study diseases.
The passage states that one key difference between embryonic and adult stem cells is their
1. size and color.
2. location and versatility.
3. cost and availability.
4. safety and effectiveness.
How are stem cells used in medicine, according to the essay?
1. They are used only for scientific research in laboratories.
2. They are used to replace damaged cells and to study diseases.
3. Their primary use is to help the body digest food more efficiently.
4. They are used to prevent common illnesses like the cold and flu.
What is one specific challenge mentioned in the passage regarding the use of stem cells?
1. They are too expensive to obtain from any source.
2. They are not useful for treating any known diseases.
3. The use of embryonic stem cells can be controversial.
4. They are impossible to find in the human body.
The passage suggests that future stem cell research aims to help people with which of the following conditions?
1. Broken bones and common skin rashes.
2. Diabetes and Parkinson's disease.
3. The flu and high blood pressure.
4. Chickenpox and seasonal allergies.