Chapter 20, Problem 2Q

Summary Introduction

To explain: The way in which discovery of Archaefructus and the results of molecular phylogenetic studies indicate Amborella as sister to all other flowering plants and has changed the concept of flower structure in the earliest angiosperm.

Introduction: Angiosperms are plants whose ovules are enclosed in an ovary. The seed is a fertilized ovule and has an embryonic plant. In angiosperms, seeds are protected within a fertilized ovary called fruit.