during a given time period is known as which of the following? secondary production ??? ??? ??? A secondary consumer, such as a fox, receives what percent of the energy fixed by primary producers in a typical field ecosystem? 1% ??? ??? ??? Most of the neurons in the human brain are interneurons ??? ??? ??? An extension of a neuron that transmits signals to other cells is a/an axon ??? ??? ??? Mu