It’s an Element. Because each of more than one hundred substances that cannot be chemically interconverted or broken down into simpler substances and are primary constituents of matter. Each element is distinguished by its atomic number, i.e. the number of protons in the nuclei of its atoms.
Answer:
adrenaline is the hormone which is directly controlled by nervous system
To get an average, you must add all of the numbers together, and divide that sum by the amount of numbers there are. There are 6 number, which is what we must divide by.

6.8g is the average for the set of measurements.
Geocentric - Earth Centered solar system
Heliocentric - Sun Centered solar system
The answer is <span>gametes:</span>