Theory of Evolution: Darwin vs. Lamarck. Texas Horned Lizard. Defense Behavior Adaptations Its horns are extensions of its cranium and contain true bone. When threatened it will puff up its body to cause its spiny scales to protrude, which makes it hard to swallow.
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Theory of Evolution:Darwin vs. Lamarck
Aug. 1744-Dec. 1829
Provided the first truly cohesive theory of evolution.
Remembered for his use/disuse theory of evolution.