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Chapter 33 Comparing Chordates

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Across
1.controls smells
4.controls internal organs
5.long, supporting rod that runs through a chordate's body just below the nerve chord
8.an animal whose body temperature is controlled from within its body
10.maintains homeostasis by providing the body with nutrients
11.maintains homeostasis by transporting materials throughout the animals' bodies
14.eggs develop within the mother's body, but are born alive
15.an animal whose body temperature is determined by the temperature of the environment
16.adaptive radiations that produce species that are similar in appearance and behavior, but nor closely related
17.eggs develop outside the mother's body
Down
2.rapid diversification of species as they adapt to new conditions
3.coordinates movement and balance
6.toxic waste first produced as ammonia
7.thinking and learning region
9.controls vision
12.developing embryos obtain nutrients directly from the mother's body and are born alive
13.includes back bone of individual bones called vertebrae

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