Which area of the mind works based on the pleasure principle

Which of the following is not a food produced in rainforests? a) coffee b) cocoa c) avocados d) wheat

The idea of spontaneous generation was disproved by in a experiment involving jars of meat

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different