Which of the following best describes why invertebrates isn't considered a scientifically valid word when classifying animals?

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which rock will weather faster?

answer: b rock

answer'(basidium)the spore--bearing structure of a basidiomycete is called a basidiocarp; ///

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genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).