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send me the notes of class xi biology chapter = 1 in attachment
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Answers
The Living world :-
◆ *What Do you understand by the term Life?*
Life is a unique and complex organization of molecules that express itself through chemical reactions which lead to growth, development and reproduction.
The objects exhibiting growth , development, responsiveness and some other characters of life is called as living beings.
◆ Characteristic of living?
1) Highly organised cellular structure
2) Consciousness
2) Growth
4) Reproduction
5) Metabolism
_________________________________
【Reproduction can't be considered as defining characters because mules can't reproduce yet they are living】
【Growth can't be considered as defining characters because mount everest shows growth but it's non-living】
___________________________________
∆ Identification :-
The process of finding a correct name and placing it in a system of classification is called as Identification.
∆ Nomenclature :-
The science of providing a unique name that will be known all across the world is known as Nomenclature.
∆ Classification :-
Placing of an organism or a group of organism in categories according to a particular system which is based on certain easily observed and fundamental characters are classifications.
___________________________________
◆ Binomial classification :-
A classification developed by Carolus Linneus.
According to it in the scientific naming , first word is for generic name and second name represents Species name.
___________________________________
◆ Systematics is the science that deals with diversity of organisms and and their comparative and evolutionary study.
◆ All the living organisms are classified into various groups based on their Characteristic according to the principles of Identification, nomenclature and classification. This branch of study is known as Taxonomy.
◆ Taxonomic hierarchy is also called as Linnean hierarchy.
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◆ Taxon :-
● Species :- Groups of individual who are morphologically similar and able to breed among themselves.
● Genus :- One or more species are together called as Genus.
● Family :- One or more Genus are together called as family.
● Order :- One or more Families are together called as order.
● Class :- One or more related orders. are together called as Class.
● Phyllum / Division :- One or more groups of classes are together called as Phyllum or Division.
● Kingdom :- One or more Phyllum are together called as Kingdom.
___________________________________
Important Taxonomic aids :-
1) Herbarium :-
A collection of plants that are usually dried , pressed and preserved on the sheets of reference.
2) Botanical gardens :-
Collection of living plants maintained for reference.
3) Zoological parks :-
Enclosed area where animals are kept.
4) Museum :-
A place where storage, preservation and exhibition of objects of natural history , arts and objects of natural antiquities.
_______________________________
Thanks!
Answer:
The Living world :-
◆ *What Do you understand by the term Life?*
Life is a unique and complex organization of molecules that express itself through chemical reactions which lead to growth, development and reproduction.
The objects exhibiting growth , development, responsiveness and some other characters of life is called as living beings.
◆ Characteristic of living?
1) Highly organised cellular structure
2) Consciousness
2) Growth
4) Reproduction
5) Metabolism
_________________________________
【Reproduction can't be considered as defining characters because mules can't reproduce yet they are living】
【Growth can't be considered as defining characters because mount everest shows growth but it's non-living】
___________________________________
∆ Identification :-
The process of finding a correct name and placing it in a system of classification is called as Identification.
∆ Nomenclature :-
The science of providing a unique name that will be known all across the world is known as Nomenclature.
∆ Classification :-
Placing of an organism or a group of organism in categories according to a particular system which is based on certain easily observed and fundamental characters are classifications.
___________________________________
◆ Binomial classification :-
A classification developed by Carolus Linneus.
According to it in the scientific naming , first word is for generic name and second name represents Species name.
___________________________________
◆ Systematics is the science that deals with diversity of organisms and and their comparative and evolutionary study.
◆ All the living organisms are classified into various groups based on their Characteristic according to the principles of Identification, nomenclature and classification. This branch of study is known as Taxonomy.
◆ Taxonomic hierarchy is also called as Linnean hierarchy.
___________________________________
◆ Taxon :-
● Species :- Groups of individual who are morphologically similar and able to breed among themselves.
● Genus :- One or more species are together called as Genus.
● Family :- One or more Genus are together called as family.
● Order :- One or more Families are together called as order.
● Class :- One or more related orders. are together called as Class.
● Phyllum / Division :- One or more groups of classes are together called as Phyllum or Division.
● Kingdom :- One or more Phyllum are together called as Kingdom.
___________________________________
Important Taxonomic aids :-
1) Herbarium :-
A collection of plants that are usually dried , pressed and preserved on the sheets of reference.
2) Botanical gardens :-
Collection of living plants maintained for reference.
3) Zoological parks :-
Enclosed area where animals are kept.
4) Museum :-
A place where storage, preservation and exhibition of objects of natural history , arts and objects of natural antiquities.
_______________________________
Thanks
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