the answer is 21<span>% oxygen, </span>
Step one: Travel approximately 18 inches up the underside of the branch you are removing. Cut up about halfway through the branch.
Step two: Move to the top side of the branch. Choose a location an inch further out from your first cut. Carefully cut down until the branch breaks free.
Step three: Find the branch collar on your trunk. This is stem tissue around the base of the branch. . Make a complete cut with a 45-degree angle kicking out from the base of the tree.
(SOURCE Chris Lambton) Add your vocabulary words in along the way if you decide to use my answer.
Answer:
4
Explanation:
How do (sensory) receptors send messages to the brain?
Via (sensory) neurons
The Nervous System and The Endocrine System.
VO2 max is the maximum rate of oxygen consumption. Helps to determine endurance capacity