Which of these is an example of behavioral isolation? the frog species rana aurora breeds in fast–moving streams, whereas its relative rana catesbiana breeds in still ponds. two species of pines, pinus radiata and pinus muricata, grow together in california, but pinus radiata sheds its pollen in early february and pinus muricata in april. two species of crickets, gryllus rubens and gryllus texensis, have different courtship songs which can be identified only by the opposite sex of their own species.

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?