2. Place these steps in order to describe the changes that
occur in the organization of the chromosome as the cell progresses
into mitosis.
a. The chromosome coils more and more tightly, forming supercoiled DNA.
b. Condensed, replicated
chromosomes attach at a
pinched region called the
centromere.
c. DNA is wrapped around histones at regular intervals, forming chromatin.
d. Interactions between parts of histones compact the DNA.

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?