Volcano a erupts rocks with sio2 content ranging from 49% to 52% whereas volcano b, 100km away, erupts materials with sio2 content of 62-68%. which statement best characterizes these two volcanoes?

a. both volcanos are shield type volcanos that are characterized by quiet eruptions.
b. both volcanos are violent, explosive volcanos that spread ash continent wide.
c. volcano a is likely to be a supervolcano with violent eruptions, whereas volcano b is probably a shield volcano with quiescent eruptions.
d. volcano a is probably a shield volcano with typically quiescent eruptions, whereas volcano b is likely a stratovolcano characterized by violent, explosive eruptions.

What must be done to breed dogs for a partical trait

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?

If a cell is placed into a hypertonic environment,what will happen to it ? a)it will shrink or shrivel b)nothing c)it will burst d) it will expand or enlarge