Which type of organism first appeared during the mesozoic era? primates cyanobacteria marsupial mammals jawless fish during which time period would the platypus have evolved? mesozoic era cambrian explosion quaternary period tertiary period
The first one I think is jawless fish because I found stuff on an eel-like creature from that time. Also marsupials and primates are from much further along the line while according to science we were WAY past bacteria being the only beings at this point:) and the second, I would say Quaternary period because that is the one we are in today (unless I read that wrong) and I have never heard of a platypus hanging out with a mastadon or something:P Hope that helps:)
Answer from: Quest
b
explanation:
Answer from: Quest
i think it would be b. tissue because 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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