Grade 4 Standards - NGSS (CA Dept of Education)

Draw a diagram of a reflex and give an example. Label and explain the following: stimulus, receptors, sensory (afferent) neuron, motor (efferent) neuron, interneuron (association), effector and response. ... c. Write a definition for natural selection, described by Darwin, using the following words: population, variation, environment, selected ... ................
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