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Home Q & A Board Biology-Related Homework Help General Biology
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Guido Guido
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7 years ago
The great size and mobility of the vertebrates are likely the result of
A) four-chambered hearts.
B) lungs used for respiration.
C) lightweight endoskeletons.
D) uterine development of offspring.
E) increased brain size and complexity.
Textbook 
Biology: Life on Earth

Biology: Life on Earth


Edition: 10th
Authors:
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CellarCellar
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7 years ago
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Guido Author
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7 years ago
This helped my grade so much Perfect
africa143
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Yesterday
Good timing, thanks!
rileyjones420
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2 hours ago
Helped a lot
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