For the answer to the question above, I think the answer is that the <u><em>f</em></u><u><em>rogs have a BACKBONE.</em></u><span>
</span>which the <span>phylum like squid, snails, and jellyfish don't have. I hope my answer helped you. Have a nice day ahead!
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The secret of an endocrine gland that is transmitter by the blood to the tissue travel through the body .
Answer:
to produce food for the plant
It is distinctive, widespread, abundant and limited in geologic time. Because most fossil<span>-bearing rocks formed in the ocean, the major </span>index fossils<span> are marine organisms. That being said, certain land organisms are useful in young rocks and in specific regions.</span>
