Answer:
B.
Explanation:
The forces that are acting up and down on the box are equal, so they cancel each other out
The forces that are acting left and right are not equal, as the force pushing right on the box overpowers the force pushing left on the box by 50 N. That means that the answer is B (as a side note, you might have accidentally switched your labels. The arrow pointing to the right means that it is pushing the box to the right).
Answer:
Artificial selection
Explanation:
Humans actively prevent nature from 'taking it's course' selecting their own pairings for traits that suit them. Ex: breeding for a bigger cow = more beef.
A membrane helps protect the cell
In this scenario, E.coli is living in our intestines, which means we are providing them with a place to live and nutrients to survive. It is also stated that they help us break down some foods.
so as you can see, we benefit them, and they benefit us.
Based on this, after defining all of your options, you will find your answer.
