What is the nature of chromosomes that align themselves on the metaphase plate in metaphase i?
a. pair of sister chromatids facing opposite poles
b. pair of nonsister chromatids facing opposite poles
c. pair of tetrads facing opposite poles

Maria wanted to grow a fern in her backyard. acting on a suggestion from a friend, she collected brown dots from the underside of a fern's leaves and then potted them. after a few days, maria saw small fern leaves erupting from the pot. which statement explains this phenomenon? a. the fern transitioned from gametophyte generation to sporophyte generation. b. the fern grew as a result of mitosis. c. the fern transitioned from sporophyte generation to gametophyte generation. d. the fern grew to be genetically identical to its parent plant.

Many animals cannot sweat to maintain a stable body temperature. what is one other way animals can cool down?

When lactate builds up in a runners muscles it causes a burning sensation what causes this to occur