Which of the following is NOT an external structure of insects? Head
Larva
Thorax
Abdomen

What initially causes a nerve impulse? release of enzymes out of the neuron movement of chemicals into the dendrites of the neuron pathogens attacking the dendrites of the neuron red blood cells bathing the neuron

One of the purposes of transcription is to produce a sequence of bases that

What type of organism is a one-celled organism that functions as a single unit? a. bi-celled b. single-celled c. pre-celled d. multi-celled