Which of the following correctly describes how positive and negative feedback mechanisms are similar? Choose 1
А
Both feedback mechanisms move a system further from its starting point
B
Both feedback mechanisms act to reverse changes in a system.
Both feedback mechanisms amplify changes to the set point of a system.
Both feedback mechanisms occur in response to stimuli.

Dna replication or repair occurs in a cell in all of thw following situations except when

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