Chapter 22.5, Problem 2MC

Summary Introduction

To propose:

An explanation for the observation that the trees secrete nectar only on young leaves and not on tougher and more mature leaves.

Concept introduction:

For the purpose of pollination plants make certain necessary structures and substances that help in its pollination. For example, plants produce sweet and pleasant scent in order to attract insects for the pollination to be carried out efficiently. They also produce bright colored flower leaves called petals in order to attract insects for pollination.