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.
Definitely i would expect them to concern themselves with your problems when they are so beset with their own. Beset means having a lot of trouble with something, or having to deal with a lot of something causes problems. For example in a sentence; With the amount of traffic nowadays, even a trip across town is beset with dangers.
Fossils could not be found in that layer of rock
Answer:
Increasing the number of trusses increases the strength of the bridge.
Explanation:
Just had this question
I am going to assume it mean what i think it does and say <span>A) Predation</span>
