k.b.abhishek. xi sci
TRANSCRIPT
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BIOLOGICAL CLASSIFICATION-CLASS XIBIOLOGY
1
BIOLOGICAL
CLASSIFICATION
K.B.ABHISHEK.
XI SCIENCE
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BIOLOGICAL CLASSIFICATION-CLASSXI BIOLOGY 2
CONTENTS
Five kingdom classification
Merits of classification
Monera
Protista Fungi
Plantae
Animalia
Virus Viroids
Lichens
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BIOLOGICAL CLASSIFICATION-CLASSXI BIOLOGY 3
FIVE KINGDOM CLASSIFICATION
LIVING ORGANISMS
MONERA PROTISTA
PLANTAE ANIMALIA
FUNGI
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BIOLOGICAL CLASSIFICATION-CLASSXI BIOLOGY 5
MERITS OF CLASSIFICATION
Prokaryotes are separated from eukaryots
All unicellular eukaryotic organisms are put in
one group.
Differentiate heterotrophic fungi from
autotrophic green plants.
Based on evolutionary relationship.
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BIOLOGICAL CLASSIFICATION-CLASSXI BIOLOGY 6
MONERA(BACTERIA,MYCOPLASMA)
BACTERIA
ARCHAEBACTERIA EUBACTERIA
AUTOTROPHIC HETEROTROPHIC
PHOTOSYNTHEIC CHEMOSYNTHEIC
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PROTISTA(SINGLE-CELLED EUKARYOTS)
CHRYSOPHYTES (diatoms , golden algae)
DINOFLAGELLATES (gonyaulaux)
EUGLENOIDS (euglena)
SLIME MOULDS (plasmodium)
PROTOZOAN (amoeba, paramecium,
euglena)
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FUNGI(Heterotrophic Eucaryots)
Phycomycetes-(rhizopus,albugo)
Asccomycetes-(yeast,penicillium)
Basideomycetes-9aspergillus,claviceps,neurospora0
Deuteromycetes-
(alternaria,trichoderma,colletotrichum)
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PLANTAE
Chlorophyll containing multcellular eukaryots.
Cell wall made of cellulose.
Life cycle shows alternation of generation
having gametophytic (n) and sporophytic(2n)
phase.
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ANIMALIA
Heterotrophic multicellulareukaryots.
Lack cell wall.
Depend on plants directly or
indirectly. Stores food reserves as fat or
glycogen.
Holozoic nutrition.
Capable of locomotion.
Follow a definite growthpattern.
Reproduction is sexual .
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VIRUS
Noncellular organism. Obligate parasites.
Body has protein coat called capsid and geneticmaterial is DNA or RNA.
plant viruses have single stranded RNA.
animal viruses have double stranded DNA orRNA.
Animal disease-mumps,herpes,chicken
pox,influenza,aids.
Plant diseases-mosaic,leaf rolling,curling,yellowingof leaves.
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BIOLOGICAL CLASSIFICATION-CLASSXI BIOLOGY 12
STRUCTURE OF VIRUS
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BIOLOGICAL CLASSIFICATION-CLASSXI BIOLOGY 13
Lichens, which are commonly found on rocks, bark, or poor soil,are composite organisms made up of a fungus and an alga. The
beard lichen seen here growing on a tree, is one of the stalked
lichens. It is made up of a central zone of loose fungal filaments,
an intermediate zone of algal cells, and an outer zone ofcompressed fungal filaments.
BEARD LICHEN
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VIROID
Discovered by T O Diener.
Smaller than virus.
Lacks protein coat.
Has a free RNA of low molecular
weight.
Disease :potato spindle tube
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LICHEN
Symbioticassociation of algae and fungi.
Algal part is calledphycobiontand fungal part is called
mycobiont.
Phycobiont is autotrophic and prepares food. Mycobiont is heterotrophic.It provides shelter and
absorbs mineral and water.
It acts as pollution indicator i.e it does not grow in
polluted area.
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BACTERIA CELL
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PROKARYAOTIC CELL
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REPRODUCTION IN FUNGI
BUDDING
FISSION
FRAGMENTATION
VEGITATIVE
ZOOSPORES
SPORANGISPORES
CONIDIA
ASEXUAL
BASIDEOSPORES
ASCOSPORES
OOSPORES
SEXUAL
REPRODUCTION
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SEXUAL REPRODUCTION IN
FUNGI Plasmogamy-fusion between two motile or
non-motile gametes.sometimes two haploid
hyphae come together and fuse.
Karyogamy- fusion of two nuclei.in some fungi
two haploid cells immediately fuse & form
diploid cells.in some a dikaryotic (n+n)occurs
which later become diploid.such phase is calleddikaryophase.
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SEXUAL REPRODUCTION IN
FUNGI Meiosis-fungi form fruiting bodies,zygote
undergoes reduction division forming haploid
spores.
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CLASSIFICATION OF FUNGI(spore formation,morphology of mycelium&fruiting bodies)
phycomycetes ascomycetes basideomycetes duteromycetes
fungi
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RHIZOPUS
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RHIZOPUS
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ASPERGILLUS
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ASPERGILLUS
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ASCOSPORES IN ASCUS
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ASCUS
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AGARICUS
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BASIDIUM CARRYING
BASIDIOSPORES
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BASIDIUM
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