Question 9 of 10
5 points
why do we only have fossils of a fraction of the things that have existed on
earth?
o
a. many environments are not suitable for fossil formation.
o
b. fossils can only form during an ice age.
o
c. fossils can only form underwater.
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d. not all mammals can become fossilized.
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Contrast how pollination is different among gymnosperms and angiosperms.

As a result of these processes the single celled organism accomplishes

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.