The DNA is found in the nucleus of the cell
Internal means its on the inside
external means its on the outside
so an internal regulator is when the proteins respond to events on the inside of a cell
and an external regulator is when the proteins respond to events outside the cell
An annular solar eclipse happens when the Moon covers the Sun's center, leaving the Sun's visible outer edges to form a “ring of fire” or annulus around the Moon. The ring of fire marks the maximum stage of an annular solar eclipse<span>.
</span><span>https://www.timeanddate.com/eclipse/annular-solar-eclipse.html
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<span>In humans, every system controls one process and multiple processes control the organs.
</span><span>- Redundancy = Safety/reliability of the system
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Hope this helps!
Science cannot prove or refute the existence of God or any other supernatural entity.