To prevent blood flowing back after each heartbeat. They ensure that the blood flows only in one direction (back to the heart).
Answer: the bog will become less productive
Explanation:
D. Chlorophyll a
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A characteristic of carbon is that it is highly reactive and can form unstable bonds with any available atom.
The cerebellum which is a part of the brain would be responsible for the motor control,sensory perception,human movement and coordination. If there is then a damage the person may have problems in coordination as well as the senses would be loss.