Answer:
A. Increasing the food supply
Answer:
Explanation: both prokaryotes and eukaryotes contain cell membrane
Answer:
The birthrate may rise.
Explanation:
If there are an increase in numbers, then obviously the amount of births will rise.
An error is that the scientist did not control their variables. They had one group of people playing the game at 6, and another group playing at 12. This means that other things might have affected the scores other than what was being tested, which was caffeine.
