B-lymphocytes are categorized as part of the adaptive branch of the immune system for all of the following reason but one. which of the following is not one of the reasons b-lymphocytes are considered part of the adaptive immunity? a) their receptors will bind to only one antigen. b) they are a first line of defense that can begin killing pathogens immediately. c) they require costimulation from an activated t- cell. d) they produce memory cells when activated.

Cells are adapted to preform specific functions. which of the following terms refers to this capability?

Where are the strongest jet streams located?

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?