tylerroberts710 tylerroberts710

12-05-2016
Biology

contestada

Vertebrates have an endocrine system of glands that secrete _____.

a
hormones
b
enzymes
c
proteins
d
none of the above

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Extremum Extremum

12-05-2016

Hormones because if you think about it. Vertebrates must have backbones and mammals have them. And, humans are basically mammals. And the glands secrete hormones.

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