The contractile vacuole expels excess fluid from the cell.
Answer:
A or B
Explanation:
To be honest both are accurate.
The armpit isn't the most precise but it is close. Under the tongue, across the forehead, as long as you have the proper tools (thermometer, the thermometer meant for foreheads) you should get a fairly accurate reading.
Answer:
B
Explanation:
The whole point of natural selection is for animals to compete to survive in that specific environment
Hope this helps!