Involuntary, meaning things in the body such as your heart is all regulated to act unconsciously while also receiving directives from the brain.
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If the number of snakes increased, the number of rabbits decrease.
If the number of insect eating birds decreased, the amount of grass increases.
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If the sperm gametes that fertilizes an egg has an XX chromosomes, it will form female offspring. X is a female, XY is a female, Y is a male and XX is a female.
The answer to ur question is a
