Match each description below with the cell type it characterizes. cell types may be used more than once or not at all. a. melanocyte b. keratinocyte c. fibroblast major cell type found in the dermis of the skin; its primary function is to secrete extracellular matrix. a b c major cell type found in the epidermis of the skin; its primary function is the production of pigment. a b c major cell type found in the epidermis of the skin; its primary function is to protect underlying tissues and organs. a b c start: 12: 16 pm save submit

20 point pls brianliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula. 5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects. 8. describe the planets’ orbits around the sun. 9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets. 13. what causes the seasons?