Answer:
What do you need help with? any answer choices or an question
Explanation:
Water's chemical equation is H2O, which would mean that there are 2 hydrogen atoms and one oxygen atom
Look up Dawrin's theory of evolution. Basically, fossil records show how life forms change over time through evolution.
Answer:
Excretion
Explanation:
The excretory system removes cellular wastes and helps maintain the salt-water balance in an organism. When cells break down proteins, they produce nitrogenous wastes, like urea. The excretory system serves to remove these nitrogenous waste products, as well as excess salts and water, from the body.
