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Kobotan [32]
4 years ago
6

PLEASE HELP!! I WILL MARK MOST BRAINLIEST ANSWER

Biology
1 answer:
Zanzabum4 years ago
6 0
Answer:
           Most zoologists believe that echinoderms share a common ancestry with hemichordates and chordates because of:
1. The deuterostome characteristics that they share (see figure 1),
2. An anus that develops in the region of the blastopore.
3. A coelom that forms from outpockets of the embryonic gut tract (vertebrate chordates are an exception).
4. And radial, indeterminate cleavage. 

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After arousal by a sensory stimulus, consciousness can be maintained by positive feedback, because of activity in the
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Answer:

This question lacks options, options are:

A) cerebral cortex.

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Explanation:

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