The Researches talk about a "Balance" within the Ecosystem that Exists within the
Stream Ecosystem. With what you know, and saw in the Video, What is the
"Balance" they are talking about when introducing the Grayling back into the
Ecosystem?

Place the steps tor the formation of the enzyme pepsinogen in correct order

Is a measure of the different types of organisms in a community. question options: tertiary secondary primary none of the above

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?