A. Neurotransmitters diffuse across the membrane of neurons
Explanation:
When we begin to move, the brain initially sends a signal to the spinal cord, then the nerve cells in the spinal cord monitor the exact coordination of the muscles. Signal from the brain and the spinal cord directs the movement of leg muscles. Signal is transmitted by release of neurotransmitter from the neuron to the synaptic cleft and its binding to the receptor of adjacent neuron.
Answer:
The electron transport system is located in the cell membrane in bacteria, while in eukaryotes it is located in the mitochondrial cristae
Explanation:
Endosymbiosis is the hypothesis that complex organelles ( chloroplast and mitochondria) within the cell came from other living organisms. That is, they originated because one cell ingested another cell. A proof of this is that these organelles have their own genome and their own transcription and translation system. Their genome is independent of the genome within the nucleus of the cell.
The genome of the mitochondria is specialized in the electron transport system. The ingestion of a cell (i.e. bacteria) with such genome could bring evolutionary advantages to the to the ingesting cell over other cells without the mitochondrial genome.
F1 generation they are purebreds meaning one parent is PP and the other is pp. they are hybrids in the F2