Suppose you are a researcher in an influenza lab and your team has uncovered four strains that have evolved changes from last year’s influenza virus. strain a has evolved four changes in its surface proteins and three changes in its interior proteins. strain b has evolved two changes in its surface proteins and seven changes in its interior proteins. strain c has evolved six changes in its surface proteins and none in its interior proteins. strain d has evolved only a single change in its surface proteins and none in its interior proteins. assuming that all other factors are equal, which strain is most likely to be infectious?

80 points pls brainliest 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?