1. The earliest plants had
(a) leaves.
(b) stems.
(c) roots.
(d) none of the above.

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?

If a dna molecule has 100 nucleotides and 22 of them are cytosine, how many thymines does it have?

Apocrine glands, which begin to function at puberty under hormonal influence, seem to play a little role in thermoregulation. where would we find these glands in the human body?