Which is a reason that many organisms that have existed on earth have left
no fossils?
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a. fossils cannot form underwater.
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b. fossils can only form near volcanoes.
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c. fossils decay according to their half-life.
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d. many organisms live only in rainforests.
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How does natural selection change thephenotypes within a population over time?

Which of these is an example of land degradation? a. containers designed to store pollutants leak. b. fertilizers provide too many nutrients to crops. c. garbage is buried so the land can be reclaimed later. d. a drought kills all the plants in an area, leaving bare land

What is the difference between a scientific hypotheses and a scientific theory?