This was written poorly, but I assume you are talking about Commensalism:
"An association between two organisms in which one benefits and the other derives neither benefit nor harm."
Advantaged: ants
Neutral party: aphids
Answer:
D
Explanation:
Placed near window and placed in closet.
Each year over 5 million collisions occur.
Stem cells are undifferentiated cells that could develop to perform a variety of tasks. One type of stem cell is the embrionic stem cell. There are also adult stem cells. To use embrionic stem cell you need to have fertilized embrios. These can be donated to research. The use of the embrionic stem cells is controversial for this reason.
