D) all of the above
all have a direct effect on soil. Hope i helped.
Indirect competition (I had this question)
Explanation:
Since both squirrels live in the same ecosystem and are competing for the same food, there is competition between the organisms. This competition is indirect because the organisms are not directly fighting over the food.
Answer:
Stops the new kidney from being rejected.
Explanation:
Your body will attack the new kidney and try to damage or destroy it. The immunosuppressant drugs suppress your body's ability to do this.
You can rub a permanent magnet against something else that can be magnetized, like a paper clip.
The structure of a cell nucleus is best seen using an electron microscope.