Science PresentationDiversity in living organisms

Introduction

Diversity means variety.Classification helps us in exploring the diversity of

life forms.The major characteristics considered for classifying

all organisms into five major kingdom are-- Prokaryotic or Eukaryotic- Whether the cells are living singly or organised

into multi cellular and thus complex organism.- Whether the cells have a cell wall and whether

they prepare their own food

5-Kingdom Classification

1-Monera2-Protista3-Plantae4-Animilia

5-Fungi

In this presentation we will discuss about kingdom-Plantae

PlantaeThey are multicellular eukaryotes with cell walls . They are autotrophs and use chlorophyll for photosynthesis. Thus, all plants are included in this group. Since plants and animals are most visible forms of the diversity of life around us.

Sub-Topics in Kingdom-Plantae

1-Thallophyta2-Bryophyta

3-Pteridophyta4-Gymnosperms5-Angiosperms

ThallophytaThe thallophyta are a polyphyletic group of non-

mobile organisms traditionally described as "thalloid plants", "relatively simple plants" or "lower plants". They were a defunct division of kingdom Plantae that included fungu, lichens and algae and occasionally bryophytes, bacteria and the Myxomycota. Thallophytes have a hidden reproductive system and hence they are also called Cryptogamae (together with ferns), as opposed to Phanerogamae. 

Images of Thallophyta

Bryophyta•Bryophyte is a traditional name used to refer

to all embryophytes (land plants) that are non-vascular plants, namely the mosses, hornworts, and liverworts. The defining features of bryophytes are that their life cycles are dominated by the gametophyte stage, that their sporophytes are unbranched and that they do not have a true vascular tissue containing lignin, although some have specialized tissues for the transport of water.

Images of Bryophyta

PteridophytaPteridophytes or Pteridophyta, in the

broad interpretation of the term (or sensu lato), are vascular plants (plants with xylem and phloem) that reproduce and disperse via spores. Because they produce neither flowers nor seeds, they are referred to as cryptogams. The group includes ferns, horsetails, clubmosses, spikemosses and quillworts. 

Images of Pteridophyta

Gymnosperms•The gymnosperms are a group of seed-

producing plants that includes conifers, cycads, Ginkgo, and gnetophytes. Their naked condition stands in contrast to the seeds and ovules of flowering plants (angiosperms), which are enclosed within an ovary. Gymnosperm seeds develop either on the surface of scales or leaves, often modified to form cones, or at the end of short stalks as in Ginkgo.

Images of Gymnosperms

Angiosperms•The flowering plants (angiosperms) are the

most diverse group of land plants, with 416 families, approx. 13,164 known genera and a total of c. 295,383 known species. Like gymnosperms, angiosperms are seed-producing plants; they are distinguished from gymnosperms by characteristics including flowers, endosperm within the seeds, and the production of fruits that contain the seeds.

Images of Angiosperms

Flowchart