Which of the following is an example of the endocrine system maintaining homeostasis? - detecting a pain stimulus and sending a signal to the spinal cord to perform an automatic response
- producing an excessive amount of hormones in the blood and not sending a signal to stop production
- releasing insulin to decrease blood sugar and releasing glucagon to increase blood sugar
- using sense organs to get information about the outside world and direct an appropriate body response

Explain why ecosystem diversity results in species diversity in a healthy biosphere

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?

18. over time, how do sand dunes tend to migrate? a. perpendicular to the movement of the wind b. in the same direction as the wind blows c. toward the wind d. in random directions