Which of the following is a function of the spines in cactus?
Do the spines of a cactus have a waxy coating because already their leaves are reduced to spines?
Statement 1: The photosynthetic function of Opuntia is taken over by the flattened stems.
Statement 2: Opuntia has no leaves – they are reduced to spines.
What is the main reason why the leaves in a cactus are reduced to spines?