cbse class 11th:plant kingdom

whittaker

monera protista fungi animalia and plantae

Bentham and hooker classification

classification based on natural affinities among organisms considering external and internal features

phylogenetic classification system

evolutionary relationship b/w various organisms

numerical taxonamy

carried out by computers based on observable characteristics

cytotaxonomy

based on cytological information like chromosome number , structure, behavior and chemotaxonomy

chemotaxonomy

uses chemical constituents of the plant to resolve confusion used by taxonomists these days

algae

chlorophyll bearing, thalloid,autotropic,aquatic organism

Unicellular algae

chlamydomonas

colonial algae

volvox

filamentous algae

ulothrix spirogyra

massive plant bodies algae

kelps

algae reproduce by

vegetative, sexual, asexual

green algae

volvox chlamydomonas chara

brown algae

laminaria fucus dictyota

red algae

porphyra polysiphonia

zoospores

on asexual reproduction ,production of different types of spores

isogamous

gametes flagellated and similar in size(chlamydomonas) or non flagellated and similar in size(spirogyra)

anisogamous

fusion of 2 gametes dissimilar in size (chlamydomonas)

oogamous

fusion b/w large non motile female gamete and small motile male gamete(volvox , fucus)

classes of algae

-chlorophyceae

-phaeophyceae

-rhodophyceae

pyrenoids

-storage bodies in chloroplast

-contain proteins besides starch

oogonium

oogonium species

ectocarpus

simple branched filamentous brown algae

kelps

profusely branched brown algae

algin

vegetative cells have a cellulosic wall usually covered on the outside by this gelatinous coating

plant body in brown algae

•holdfast

•stipe

•frond

gametophyte

produces gametes

antheridium

•male sex organ in bryophyte

•produce antherozoids

archegonium

•female sex organ in bryophyte

•produce egg