Question

question①
what are the two key features of stem cells?
select all that apply
□ they have entered a g₀ phase.
□ they have a high division rate.
□ they are fully differentiated.
□ the are undifferentiated.

Explanation:

To determine the key features of stem cells:

1. Stem cells are undifferentiated (they haven't specialized into a specific cell type yet), so "They are undifferentiated" is correct.
2. Stem cells have a high division rate to produce more cells (either more stem cells or differentiated cells), so "They have a high division rate" is correct.
3. "They have entered a \( G_0 \) phase" is incorrect because \( G_0 \) is a quiescent phase, and stem cells are actively dividing or ready to divide, not in \( G_0 \) typically.
4. "They are fully differentiated" is incorrect as fully differentiated cells have a specific function and structure, while stem cells are undifferentiated.

Answer:

• They have a high division rate.
• They are undifferentiated.