The main parts of the peripheral nervous system are . A. the brain and spinal cord
B. nerves
C. the skull and backbone
D. all of the above

Which organelles are involved in energy conversion

Which phrase is the best summary of the model shown? a. the transfer of the sun's energy through trophic levels b. a series of aerobic and anaerobic reactions c. a transformation of light energy into chemical energy d. the breakdown of food molecules

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above