Question 17 of 25 What happens in a global convection cell? A. Cool air and warm air repeatedly collide, pushing air up and causing storms B. Wam ait moves upward in the center, cool air moves downward at the edge C. Cool air noves upward in the center, warm air moves downward at the edge D. iar 3 and cool aT Ovee n cireles, causStng huurTICanes and tomades

Urgent. the table shows the relative blood flow through some organs in the human body that is, the percentage of blood that flows through a given organ, through which organ(s) does all the blood flow? explain the effect of exercise on blood flow to skeletal muscles.

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?

How do specific cell structures and organelles contribute to maintaining homeostasis in the cell?