Human Population Growth
from 1650 to 2004
1. Which of the following factors is most likely
NOT contributing to the growth exhibited between
1970 and 2010?
a) An increase in immigration
b) A high birth rate
c) A high death rate
d) A decrease in emigration
HELLLPP! ( I have the picture of the chart)

Why are scientists concerned about the depletion of the ozone levels in the stratosphere?

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.

List five ways we are indebted to phytoplankton