Sally was analyzing samples of dna. she had dna samples from bacteria, a whale shark, a bald eagle, and a human. just by looking at the structure and components of the dna, what could sally conclude? a) the eagle and shark would have very similar dna b) the dna of the human would have a more complex physical structure than the rest c) only the dna of the bacteria would be coiled into a double helix, so she could identify it d) all dna is made of the same components so she would see no difference between the samples

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?