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A __________ produces a rapid,automatic motor response to a stimulus.
Q1: About 25 million years ago,the anthropoids that
Q5: The type of light-detecting visual pigment complex
Q5: A layer of calcified tissue called _
Q23: An _ is a group of organs
Q28: Fungi and _ are the main decomposers
Q36: The major purpose for stems appears to
Q40: A neuron that stimulates a muscle cell
Q41: What is the mechanism by which synthetic
Q47: The evolution of bilateral symmetry enabled animals
Q54: It takes the Earth _ to orbit