Heterophylly means

Subsidiary cells of stomata are modifications of $..........$.

The leaf parts get modified into spines in order to

You have heard about several insectivorous plants that feed on insects. Nepenthes or the pitcher plant is one such example,which usually grows in shallow water or in marshy lands. What part of the plant is modified into a pitcher? How does this modification help the plant for food even though it can photosynthesize like any other green plant?

The largest leaf is associated with ...........

The bladder of $Utricularia$ and pitchers of $Nepenthes$ are modifications of