ladaveneahanna ladaveneahanna

06-04-2016
Biology

contestada

Fish are classified as vertebrates because they have
a. a brain.
b. a backbone.
c. two germ layers.
d. bilateral symmetry.

Respuesta :

WhatEverIDontCare WhatEverIDontCare

06-04-2016

B, a backbone.

Not A, because we know some species that aren't vertebrates and have a brain.
C. two germ layers, isn't a characteristic specific to vertebrates.
d. bilateral symmetry, no for the same reasons as A.

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rvarela1 rvarela1

06-04-2016

the answer is b) a backbone

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