A large asteroid or comet impacted the earth.
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A name used by scientists, especially the taxonomic name of an organism that consists of the genus and species.
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A.) Pollen are well preserved in the sediment layers because they are highly resistant to decay.
B.) Other indicators that can be used to determine past climates are through the analysis of the width of tree rings and the coral reefs formed underwater.
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Acquired immunity is immunity you develop over your lifetime. It can come from: a vaccine. exposure to an infection or disease. another person's antibodies (infection-fighting immune cells
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plants need protein for healthy growth and development. One of the critical roles of protein in plants is regulating phototropism and mediating the response of plants to light-dark cycles. Proteins are also involved in energy-generating reactions, intracellular structure and membrane transport.
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