A. A change in allele frequencies in a population over a span of generations is . b. Evolution that occurs by results in nonrandom reproductive success and adaptive change.
c. Evolution that occurs by results in a change in a population's gene pool due to chance.
d. Evolution that occurs by results in a change in a population's gene pool due to the movement of individuals into and out of the population.

What is the similarities and differences between bacteria and eukaryote?

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?

Which of the following is a period in the paleozoic era? devonian cambrian permian all of the above