Question

mangrove pneumatophore roots _________.
a. prop the trees up above the water line
b. excrete excess salt
c. absorb carbon dioxide from the air
d. none of the above
please select the best answer from the choices provided

Explanation:

Mangrove pneumatophore roots are specialized roots that grow upwards out of the water - logged soil to absorb oxygen from the air. They do not prop the trees up above the water line (stilt roots do that), do not excrete excess salt (some mangrove leaves do that), and do not absorb carbon dioxide from the air (leaves are mainly for that).

Answer:

D. none of the above