1. : the final chemical messenger and "trigger" for muscle contraction. it binds to troponin. 2. : a neurotransmitter released at motor end plates by the axon terminals. 3. : it diffuses across the cell membrane resulting in depolarization. 4. : activates synaptic vesicles in axon terminals to fuse with plasma membrane of axon terminal. 5. : where the axon of a motor neuron connects with the muscle fibers. 6. : breaks down ach into its building blocks, rendering it inactive.

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.

Rna polymeras should attache to the promoter.

In fact it is not just nuclear fusion and fission that  can  transform  matter  (or mass)into energy. any time  energy  is produced, some small amount of  matter  or mass isconverted into energy.