DNA is a very long molecule (seven feet in one cell), but is also very thin (only about a dozen atoms across). The cell nucleus is very small (about 1 micrometer across). How can such a long molecule fit into such a small place. WILL GIVE BRAINLIEST

What did hunter gathers do to alter the environment?

Me 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?

Identify the structure in organisms that do not have kidneys that is adapted to regulate water balance