The right answer is A. producer.
Phytoplankton are all cyanobacteria and microalgae (microscopic plants) present in surface waters and drifting with the currents. Unknown because invisible to the naked eye, phytoplankton is the lung of our planet. Thanks to photosynthesis, it produces more than half of the Earth's oxygen and consumes half of the carbon dioxide. Phytoplankton is essential for marine life because it is also at the base of the ocean food chain.
The enzyme pepsin functions with a very low pH of around 2. It is found in the stomach, with the acidity coming from the hydrochloric acid present there. it breaks proteins into amino acids.
Dopamine is predominantly engaged in gross, unconsciously occurring motions of the skeletal muscles, which has an impact on motor function.
Dopamine is a neurotransmitter that predominantly influences motor control and is involved in large-scale, unintentional skeletal muscle contractions. Dopamine also contributes to emotional reactions. Parkinson's disease is characterized by a dopamine deficit and tremors or uncontrollable quivering motions in the sufferer. Acetylcholine contributes to the speedy transmission of nerve impulses by spilling into the synapse region. Norepinephrine affects arousal maintenance, dreaming, and mood modulation. Serotonin causes sleep, changes sensory perception, regulates temperatures, and plays a role in the regulation of mood.
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Answer:
I think it is, Cells are the basic unit of life.
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