Question and answer
When fish breathe, their gills exchange oxygen and ___________. a. Carbon dioxide c. Carbon monoxide b. Nitrogen d. Only oxygen is exchanged
When fish breathe, their gills exchange oxygen and CARBON DIOXIDE.
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Asked 3/27/2014 6:40:46 PM
Updated 3/27/2014 7:19:59 PM
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This answer has been confirmed as correct and helpful.
Confirmed by yumdrea [3/27/2014 7:19:59 PM]
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The word “arthropod” means fake foot.
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The word “arthropod” means fake foot. This is False.
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1 Answer/Comment
Walking requires more energy than swimming for amphibians. This is True.

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The ___________ is the male reproductive structure found in some plants. a. antheridium b. archegonium c. rhizoids d. gametophyte
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The antheridium is the male reproductive structure found in some plants.
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1 Answer/Comment
d. spiders, mites, and scorpions is considered to be an arachnid.
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