Which one dies first when a ring of bark is removed

ring bark occurs in

ring bark occurs in

Which one is made of a single ring of atoms ?

Which one is made of a single ring of atoms ?

Which one is made of a single ring of atoms ?

Which of the following is not a part of bark?

In the arrangement shown in figure,there are two coils wound on a non-conducting cylinderical rod.Initially the key is not inserted.Then the key in inserted and later removes.Then, A. The galvanometer will not deflect B. The galvanometer will deflect in one direction when the key is inserted and in the opposite direction when the keys removed C. The galvanometer will deflect in one direction when the key is inserted and remain still when the key is removed . D. The galvanometer will deflect in one direction when the key is inserted and in the same direction when the key is removed .

How does the removal of a ring of bark and wood from the trunk of a tree kills it ?

How does the removal of a ring of bark and wood from the trunk of a tree kills it ?