When an organism joins a new population, its genes become part of the new population’s gene pool. How does this gene flow affect populations? Gene flow between populations has no effect on the gene pool.

Gene flow between populations increases genetic diversity over time.

Gene flow between populations decreases genetic diversity over time.

Gene flow increases the chance for reproductive isolation which can cause new species to form.

Adigestive system that is a series of tubes beginning at the mouth and ending at the anus is a digestive system.

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?

The human body needs energy in order to carry out life processes such as breathing. where does the body get this energy? a. from eating food b. from learning about new things c. from lying in the sun d. from sleeping