18-03-2014, 11:44 AM
Biology - Diversity in living organisms
Diversity in living organisms[.pptx (Size: 147.87 KB / Downloads: 20)
Biodiversity
Occurrence of different forms of living being which differ in external appearance ,size,colour ,internal structure etc.
Classification
The arrangement of organisms into groups and sub-groups on the basis of their similarities and dissimilarities.
Needs of classification
Study of one or two organisms of a group give information about whole group. To identify organisms.
To study fossis and organisms of other location.
Taxonomy categories
Kingdom
Division[for plants],Phylum[for animals]
Class
Order
Family
Genus
Species
Human hierchary
Kingdom-Animalia
Phylum-Chordata
Class-Mammalia
Order-Primata
Family-Hominidae
Genus- Homo
Species-Speiens
Sub species-speiens
Kingdom monera
They are prokaryotes.
They are unicellular.
Well defined nucleus is absent only nucleoid is present.
Membrane bound cell oraganells are absent.
Flagella,if present are single.
Cell wall ,if present is made up of murein orpeti glycon.
Autrotrophic, hetrotrophic nutrition.
Example; Mycoplasma[PPLO].
Kingdom fungi
Heterotrophic, Spore producing, Eukaryotes.
Body called mycelium is made up of thread like structure called hypea.
Multicellular except yeast is unicellular.
Cell wall is made of chitin and cellulose.
Nutrition may be decomposers and saprophytes .
Reserve food materials is glycogen and oils.
Example; Yeast, Agaricus, Penicillium.