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A student observes an animal that has a backbone, gills, and scales. It lays eggs and is cold−blooded. What does this animal have in common with all mammals? Answer Options with 5 options A. a backbone
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A student observes an animal that has a backbone, gills, and scales. It lays eggs and is cold−blooded.

What does this animal have in common with all mammals?
Answer Options with 5 options
A. a backbone
B. gills
C. scales
D. egg−laying
E. cold−blooded

User Flaschenpost
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1 Answer

1 vote
A. a backbone

If you think about it, us mammals (humans are mammals) don't have gills, scales, we do not lay eggs, and we are not cold-blooded. But we do have a spine, or backbone.
User Abhishek Choubey
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