Thylacosmilus is a marsupial, and Smilodon
is a mammal. Thylacosmilus and Smilodon both have saber teeth, but
they do not share an ancestor that had saber teeth. What are saber teeth for these organisms?
O analogous structures
O homologous structures
• vestigial structures
• mutated structures
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Imagine a person stepping on a pin and pulling his or her foot away. look at the reflex arc of this scenario below. which statement best describes the image? a)the sensory nerve carries the signal from the effector to the interneuron, and the motor neuron carries the signal to the receptor. b)the motor nerve carries the signal from the receptor to the interneuron, and the sensory neuron carries the signal to the effector. c)the sensory nerve carries the signal from the receptor to the interneuron, and the motor neuron carries the signal to the effector. d)the sensory nerve carries the signal from the receptor to the motor neuron, and the interneuron carries the signal to the effector.