We should expect that the rat will have have more difficulty in learning the task compared to a normal rat. This is because the rat has been injected with a certain drug that oppresses the dopamine activity. And then the rat is placed in an operant chamber where a lever-pressing task is shaped through positive reinforcement.
Photosynthesis gives the plant food/nutrients to be able to survive. They make their own food
The answer is A because it is not formed from decaying marine animals.
C) As the trait will then pass to others without it and through natural selection will become abundant
