How does motor neuron disease cause muscle weakness? For example, I know that muscle weakness and wasting is cause but I don't understand why.

i think that the best answer would be c.

tell me if im wrong : )

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

we would need to see the picture to answer it