Why is the nucleus considered the command center of the cell?
a.
it contains the genetic instructions for every function of the cell.
b.
it is the cell’s powerhouse and processes energy for the cell.
c.
it is the organelle present in both prokaryotic and eukaryotic cells.
d.
it is responsible for packaging proteins for delivery out of the cells.

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom

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?

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b.diffusion c. endocytosis d. exocytosisc. endocytosis