What do both plant and animal cell membranes do

What is the farthest destination to date for a human spaceflight mission?

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

This is the interaction of two organisms where one is and the other is neither nor harmed.