How does the ozone layer impact life on Earth? a)
The ozone layer hole is the main reason for climate change

b)
It filters out harmful UV radiation from the sunlight

c)
It magnifies sunlight causing sunburn

d)
Aerosol cans still contain CFC's that thin the ozone

The number of living organisms in a particular area is

People with one sickle cell allele are not likely to get malaria. what is this an example of?

Read this summary of a scientific theory: "cells are the most basic structural and functional units of life. all living organisms are made up of one or more cells. all cells that are alive in the world today came from pre-existing cells." which of the following would require this theory to be modified? -a.) a survey finds that a majority of people believe viruses carry out the basic processes of life. -b.) a prominent scientist says she feels strongly that one day the theory will be challenged by life on other planets. -c.) the dna of unicellular and multi-cellular organisms is shown to have many fundamental similarities. -d.) scientific observations show that microscopic organisms living in the deep ocean are not made up of cells.