It does not include plant sources.
Answer:
Types of Wetlands
tupelo gum trees
Tupelo Gum Pond, Source: Missouri Dept of Conservation
The answer should be 4. All of the above.
Answer:
These are needed to mimic the blood vessels which these organs will use for the supply or drainage of fluids e.g blood.
In addition the empty tunnels serve as the routes for nutrients and oxygen supply for the organ.
In summary the tunnels provided a vascular structure to support the organ
Explanation:
