Phylloclade,the modified photosynthetic organ,is a

Thorn is a modified branch because

Which is not a modification of stem?

Tendrils are found in the following plants. Identify whether they are stem tendrils or leaf tendrils: $(a)$ Cucumber,$(b)$ Peas,$(c)$ Pumpkins,$(d)$ Grapevine,$(e)$ Watermelon.

Define/Explain the following terms:
$(i)$ Leaf-like stem (Phylloclade)
$(ii)$ Stolon

Which of the following stems performs photosynthesis?