Which is the best suitable reason for choosing the source of water mentioned below ?
A. Ground water: clean and easily usable
B. Underground water: does not evaporate, recharge well and clean
C. Ground water: Contaminated
D. Underground water: does contain bleaching agents such as chlorine

One function of the poly-a tail on eukaryotic mrna sequences is to the mrna be transported from the nucleus to the cytoplasm. prokaryotic mrna also has a poly-a tail. choose the best explanation of the prokaryotic poly-a tail. a. prokaryotic poly-a tails have the same functions as eukaryotic poly-a tails, because this process is highly conserved throughout different species. b. prokaryotic poly-a tails aren't important, because prokaryotes don't have nuclei. c. prokaryotic poly-a tails have other functions, because prokaryotes don't have nuclei. d. prokaryotic poly-a tails are composed of a different molecular structure compared with eukaryotic poly-a tails.

In the water cycle , when does water undergo a chemical change

What noticeable trend from this graph might be used to make a conclusion?