If reptiles have a closed circulatory system, then what kind of circulatory system do reptiles have? Answer choices: - open - systemic - complex - dense - cold - three - closed - organ
closed

If hair and skin shares some of the same structures and basic functions, then what shares some of the same structures and basic functions? Answer choices: - sensory neurons - all programming languages - Veins and arteries. - everything - all objects - an organism's body - hair and skin - animals
hair and skin

If seasons can cause phase changes, then what can cause phase changes? Answer choices: - Electrical - an object - seasons - imbalanced - hormones - sweating - Winter - climate
seasons