A)Tetrapods were no longer tied to the water for reproduction. B) Tetrapods could now function with just lungs.
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organ system-an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.
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The basic repeating unit of nucleic acids are known as nucleotides. a nucleotide consists of three distinct chemical groups.
How is mitosis different in plants and animals? a. in animals, the cell membrane pinches together. b. in plants, the dna is one circular chromosomes. c. in plants, there are no sister chromatids. d. in animals, a new cell wall forms.