Vessels are mainly found in
Xylem of angiosperms
Xylem of gymnosperms
Both $(a)$ and $(b)$
None of these
The cells or tissues of plants which have lost the power of division are called
Passage cells are thin walled cells found in
The chief water conducting elements of xylem in gymnosperms are
Collenchyma is a type of mechanical tissue but it is not as efficient as sclerenchyma. However, it has certain advantages like
Which one of the following is an effective tissue of growing organs with sufficient elasticity