Chapter 26.3, Problem 2CC

Summary Introduction

To identify:

The lineages as plants, non vascular plants, vascular plants, seedless vascular plants and seed plants with reference to Figure 26.18 “Highlights of plant evolution” and also explain which of these categories are monophyletic and which are paraphyletic with reference to Figure 20.10 “Monophyletic, paraphyletic and polyphyletic groups’, in the textbook.

Introduction:

The evolution history of the organism is known as phylogeny and the branched diagram for evolutionary relationships among species based on their genetic and physical characteristics is known as phylogenetic tree which is also known as evolutionary tree.

Monophyletic groups are those which consist of ancestor and all of its descendents, paraphyletic group includes ancestor and few but not all descendents and polyphyletic group includes species that are distantly linked and does not include recent common ancestor.