Chapter 21, Problem 4WIO

Summary Introduction

To determine:

The way in which a biologist can ascertain the origin of thorns, spines, and tendrils.

Introduction:

Stems and leaves are the vegetative parts of a plant. The tissues that constitute the leaves and stems are dermal, ground, and vascular tissues. Stems provide support to the leaves, which produce carbohydrates such as sucrose by photosynthesis.