Some steps in cell division are shown below:

1. chromosomes condense and pair up
2. segments of dna of sister chromatids twist and cross
3. exchange of dna occurs between chromosomes
4. four daughter cells are created that are haploid

which of the following steps is least likely to occur during meiosis 1?

step 1
step 2
step 3
step 4

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

In what part of the body does the most muscle activity happen?

Membrane vesicles containing an internal sodium chloride (nacl) concentration of 0.14 m are placed into separate beakers each containing a different solution. the first beaker contains 0.14 m sucrose, while the second beaker contains 0.14 m calcium chloride (cacl2). the temperature is 25°c. what is the solute potential inside the vesicles, expressed in units of mpa?