In a ecological pyramid, when we move up energy decreases by 10% at each step 'cause they get lost as "Heat" when energy flows from one Trophic level to another.
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Mutations and sexual reproduction increase genetic variation in a population. Natural selection occurs when environmental pressures favor certain traits that are passed on to offspring. ... Individuals may mutate, but natural selection acts by shifting the characteristics of the population as a whole.
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How can we answer a question from a reading without seeing the text book?
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They are all built of chemically linked monomers.
Apple (fruit): leaf, stalk, mesocarp, seed, endocarp, exocarp. Lily (flower): stamen, style, ovary, ovule, , stigma, petal, receptacle, peduncle, and sepal.