Why is it important for epithelial cells to sense damage?

Need with these questions . need the answers in a rush for these questions are the answers i put down are correct or not? ?

Which tool could you see a plant cell? a. a filter b. a microscope c. a microwave d. an electromagnet

Which contributions did galileo make to the model of the solar system? check all that apply. a mathematical model for the orbits of the planets scientifically accurate data on planetary orbits data that showed that planets reflected sunlight similar to earth's moon up the idea that stars are other suns that do not move u observations of the moons of jupiter rotating around the gas giant