C. spinal nerves
it is the answer to your question.
The reason an energy pyramid is limited to four to five is because as the pyramid gets smaller at the top more and more energy is lost. Primary producers get 100% of the energy, Primary Consumers get 10% . Secondary 1% Tertiary .1% and Apex get .01% so after that point it has little to no energy and the Apex is the highest on the food chain.
what are the answer choices
Because a gene pool represents the genetic diversity found within a population, populations are made up of different species so a gene pool is specific to one population
She picks up protein powder so she can make a protein shake-This represents ribosome, organelle specified for the biological protein synthesis (translation). In this case protein powder represents amino acids, structural units for the protein synthesis.
She eats part of it, and then stores the rest of it in a paper bag so she can eat it later. Paper bag in this case represents vacuole, organelle that contains molecules that have been engulfed.
Later in the day, she puts together several small packages of candies as gifts for her nieces and nephews. She labels each package and sends it through the mail
. This represents the function of the Golgi apparatus, the eukaryotic organelle that packages proteins into vesicles inside the cell before the vesicles are sent to their destination via certain patway.