Who is the fist precident in the united state

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

Need asap plz hurry im being timed when a body cell divides through the process of mitosis, the chromosomes in the daughter cells a. represent only the healthiest chromosomes from the parent cell. b. represent only half of the chromosomes in the parent cell. c. are identical to the chromosomes of the parent cell. d. are formed when chromosomes from the parent cell cross over.

What are the three different shapes, or structures, of carbon-based molecules