There are some important points to remember from the living world class 11 notes for neet. Here it is...
the living world class 11 notes for neet
THE LIVING WORLD
POINTS TO REMEMBER
Characteristics of Living Organisms
Growth, reproduction, metabolism, cellular organisation, consciousness (ability to sense environment), self-replicating and self regulation.
1. Reproduction and growth are NOT defining properties.
2. Metabolism, cellular organisation and consciousness are defining properties.
Biodiversity
Biodiversity : Term used to refer to the number of varieties of plant and animals on earth.
Need for classification
To organise the vast number of plants and animals into categories that could be named, remembered, studied and understood.
Rules for Nomenclature :
->Latinized names are used, written in italics
->First word represents the genus, second word is species name.
->Printed in italics; if handwritten then underline separately.
->First word starts with capital letter while species name written in small letter.
ICBN
International Code of Botanical Nomenclature (for giving scientific name to plants.)
ICZN
International Code of Zoological Nomenclature (for giving scientific name to animals.)
Taxonomy
Study of principles and procedures of classification.
Binomial Nomenclature
Given by Carolus Linnaeus. Each scientific name has two components - Generic name + Specific epithet.
Systematics
It deals with classification of organisms based on their diversities and relationships among them. Term was proposed by Carlous Linnaeus who wrote ‘Systema Naturae’.
Taxonomic Hierarchy
Arrangement of various steps (categories or taxa or ranks) of classification.
Species -> Genus ->Family -> Order -> Class -> Phylum (for animals) / Division (for plants) Kingdom ->
Species
All the members that can interbreed among themselves and can produce fertile offsprings are the members of same species. This is the biological concept of species proposed by Mayr.
Three Domains of Life
Proposed by Carl Woese in 1990 who also proposed the six kingdom classification for living organisms. The three Domains are Archaea, Bacteria and Eukarya.
Herbarium
Storehouse of dried, pressed and preserved plant specimen on sheets.
Botanical Garden
Collection of living plants for reference.
Taxonomical aids
Zoological Park (Places where wild animals are kept in protected environment.)
->Keys (Used for identification of plant and animals on the basis of similarities and dissimilarities.)
->Fauna: (Index to animal species found in a particular area)
->Flora (Index to plant species found in a particular area.)
->Manuals (Provide information for identification of name of species in an area.)
->Monograph (Contain information on one taxon.)
Key words
class 11 ncert biology chapter 1 notes
neet preparation biology notes
the living world class 11 notes for neet