Myofibrillar proteins in muscle.
If I am not wrong, I believe the answer is Producers. The reason as to why I say that producers is the answer is because in every food chain, there needs to be a base. That base is what provides the starting energy that will later on move up in the food chain.
They are positively and negatively charged
the <em>sun's corona</em> is only visable when there is a solar eclipse
The auxillary bud has the potential to produce a lateral shoot.