Read this sentence from neil degrasse tyson's preface to his book the pluto files:

the pluto files chronicles and documents pluto's remarkable grip on the hearts and minds of the american public, the professionals, and the press.
why would this be considered an example of expository writing?

a. it reviews tyson's book and offers an opinion.
b. it informs the reader about the public's love of pluto.
c. it argues that people should not care so much about pluto.
d. it provides a fictionalized account of pluto's history.

World class speed skaters can skate a 3,000-m course in about 4 minutes. what is their average speed for this course. a. 12.5m/s b. 1.33m/s c. 13.3m/s d. 1.25m/s

Apaleontologist finds a plant fossil that shows that the plant had seeds. what can the paleontologist conclude?

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 are composed of a different molecular structure compared with eukaryotic poly-a tails. b. prokaryotic poly-a tails have the same functions as eukaryotic poly-a tails, because this process is highly conserved throughout different species. c. prokaryotic poly-a tails aren't important, because prokaryotes don't have nuclei. d. prokaryotic poly-a tails have other functions,because prokaryotes don't have nuclei.