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ad-work [718]
4 years ago
9

Which of the following animals is the most complex? Base your decision on body plan, structures used to carry out various functi

ons, and structures used to respond to the environment
flatworms
hydras
sponges
sea urchins
Biology
2 answers:
MAVERICK [17]4 years ago
6 0
I think so Flat worms are more complex in all these options.because they have better response system than other options.
Rudik [331]4 years ago
6 0
Flatworms.................
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Beyond the organism, what is the correct order of the levels within the environment
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<u>levels of organization </u>

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