What is the reason for agricultural run-off to kill fish in coastal areas that are potentially hundreds of miles from the fields? a. the fertilizer traps sediments which ultimately clog the gills of the fish. b. the pesticides applied to the crops are selectively toxic to marine fish. c. excess fertilizer can cause dinoflagellate blooms which produce toxins. d. the freshwater from the rivers dilutes the salt water and kills the fish.

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.