a group of single-celled eukaryotes.
<u><em>Answer: Formation differs in that protostomes form a coelom when the mesoderm splits, whereas the deuterostomes form a coelom when mesoderm cells combine, resulting in the body cavity. This formation occurs during the gastrula, or three-layered structure stage of development.</em></u>
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<u><em>Explanation:</em></u>
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Answer:
By letting the elephant lift you hand?!!
Explanation:
I have no idea
BUT......
Please mark BRAINLIEST!!!!
Answer:
just 3 and 4 are false I think.
<h3>
Answer:</h3>
Vertebrates have backbones, while invertebrates do not.
Humans, for example, are vertebrates because we have backbones.