What happens in the photosystem ii protein when it is hit by a photon of light? a. a channel in the photosystem ii protein allows the light to pass into the thylakoid. b. the water-splitting enzyme is released into the inner space. c. water molecules enter the thylakoid membrane and are split. d. an electron is excited and enters the electron transport chain

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.

1. the is the thinnest part of the earth. 2. the is the thickest part of the earth. 3. what metals are mentioned in the text?

Of seawater increases with decrease in the temperature. therefore, the cold water sinks to the deeper layers at the bottom