2) The E. coli bacteria can have several mutations that affect the lac operon
system. One mutation inhibits the ability of RNA polymerase to bind to the
lac operon. How would this affect the cell?

A)
The cell would make more lactose.
B)
There would be no lactose outside of the cell.
C)
The cell would not be able to process tryptophan.
D)
The cell would not be able to process lactose

Why is excretion necessary to maintain homeostasis?

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?

The diagram shows the development of the oocyte and the follicle during the menstrual cycle. identify at which stage in the cycle the hormone levels are at their highest and most active.