According to mendel’s law of segregation, what happens to chromosomes during meiosis?
a. heterozygous chromosome pairs undergo crossing over.
b. homozygous chromosome pairs attach to their centromeres.
c. homologous chromosome pairs line up in the center of the cell.
d. homologous chromosome pairs pull away from each other.

Mike has a problem with his testosterone. he is unable to produce enough. which will most likely be affected by his inability to produce testosterone? check all that apply.

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

2. how does the miller-urey experiment fall short of demonstrating that life can arise from inorganic molecules? explain. a. it doesn't show a leap between a collection of amino acids and a single-celled organism. b. it recreates the conditions that existed at the earth's beginning, but no molecules form as a result. c. it doesn't provide evidence of the formation of amino acids. d. it doesn't show how multicellular organisms developed from unicellular organisms