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Prokaryotic organisms were the only life-forms present on earth for almost 2 billion years.Multicellular eukaryotes have only been around for about 25% of earth's history
Q1: Which of the following characteristics applies to
Q13: Evolution acts at the level of the<br>A)ecosystem.<br>B)population.<br>C)species.<br>D)community.
Q24: Nearly all viruses are constructed of<br>A)DNA with
Q26: Some prokaryotes attach to other substrates by
Q44: As a mechanism of evolution,natural selection acts
Q48: Recent research has suggested that some pseudogenes
Q52: Irregular dental hygiene and a high sugar
Q53: Sexual reproduction in zygomycetes differs from sexual
Q54: The body of a fungus has several
Q63: What do echinoderms and chordates have in