Answer:
A) receptor, sensory neuron, interneuron, motor neuron, effector 
Explanation:
In a reflex arc, the receptors present in the skin receive stimulus and generate afferent impulse. The sensory neuron transmits the impulse to the interneuron. Interneuron is present in the spinal cord and activates it. The interneuron then sends back the impulse through the motor neurons to effectors whcih are present in the muscles for the response.
 
        
             
        
        
        
Answer:
I believe you just answered it yourself. they development an immunity to insecticides the more they are exposed to it.
 
        
             
        
        
        
Answer:Succession as progressive change in an ecological community. Primary vs. secondary succession. The idea of a climax community.
Explanation: