myweb17 myweb17

08-03-2017
Biology

contestada

Most arthropods and some mollusks and tunicates have ______ circulatory systems, which means fluid transporting nutrients and oxygen flow directly into internal organs.

A. closed
B. nonexistent
C. open

Respuesta :

cowboyup221 cowboyup221

08-03-2017

i believe the correct answer is "A. closed"

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safehaven2018 safehaven2018

14-03-2017

I think the answer is closed

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