Aresearcher isolates the blood of an individual who is sick. the blood is filtered through a porous material that will prevent all cells from passing through. the filtered serum of the blood is then injected into a healthy patient. this patient shows signs of the illness within days of the inoculation. what is the most likely causal agent of the disease based on this information? a) a virus b) a fungal pathogen c) a bacterial pathogen d) a protozoan parasite

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?