♥ When someone is no longer living on this earth or anywhere else its called extinct.
<span>threatened - being hunted smally
</span><span>endangered - Only a few left on earth (usually a few hundreds, sometimes less)
</span><span>dinosaurs - extinct animals.
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Final answer: <span>extinct </span>
The appropriate answer is doing. All of the above. Heavy metals are sometimes used in agricultural chemicals and can contaminate both terrestrial and aquatic ecosystems. Heavy metal concentrations can build up overtime as industrialization progressed. Chemical spills can introduce heavy metals to ecosystems quickly with devastating effects.
D. <span>The mass produced by the photosynthesis reaction is used by the plant to fuel respiration and is turned into carbon dioxide, water, and energy.</span>
Oceans bring warm water to distant shores. Ocean temperatures and winds are coupled into a complex interactive system. Varying ocean temperatures affect local atmospheric pressure, which creates regional wind patterns that, in turn, drive oceanic currents that affect surface ocean temperatures.
Neurotransmitters are broken down by enzymes in order to avoid over-stimulation of a neuron and to allow for the transmission of impulse another impulse by the neurons.
<h3>What are neurotransmitters?</h3>
Neurotransmitters are chemical substances which are released at neuronal ends and which help transmit sction potential from one neuron to another.
After the transmission of impulse between the neurons, neurotransmitters ate broken down by enzymes.
Neurotransmitters are broken down by enzymes in order to avoid over-stimulation of a neuron and to allow for the transmission of impulse another impulse by the neurons.
Learn more about neurotransmitters at: brainly.com/question/1305933
