Sunday, 16 March 2014

Diversity in the living world TEXTBOOK ANSWERS AND SOLUTIONS CBSE –CLASS –XI-BIOLOGY




Introduction-

This chapter deals with the diversity in living being alive is unique, complex. Each leaving being performed its own way of surviving in every weather condition. This unique feature separates the living & the non – living organisms from each other.


Q. 1) Why are living organism classified?


            i) to identify easily.

            ii) study of organisms of other places

            ii) study of fossils.

            iv) evolution of various taxa can be known

            v) it brings out similarities & dissimilarities among organisms.


Q. 2)    Why are classification systems changing very now & then?


            Modern science is improving day by day due to the continuous addition of new tools, techniques, intelligences. Earlier eternal more physiological characters were the imp’s tool for classifications. Then came a anatomy, embryology, cellular structure chromosomes, bio-chemical analysis & now DNAS making are being carried out to find relationships & classify organisms.

            So it’s changing every now & then. 3) What different criteria would you choose to classify people that you must after?


            1) Family friends ii) Sex iii) height iv) playmate v) school makes vi) classmates, vii) Adults juniors, seniors same age.


4) What do we learn from identifications of individuals and populations?


            Individuals      Each one possesses a specific contribution of trails not found in other.


            Population     I) each population is highly invaded

                                    ii) Anatomical similarity.

                                    iii) Resembles more in one population than other.


5) Given below is the scientific name of mango identify correctly written name

           

            Magnifier Indicia

            Magnifiers indicia


            An- Maqngifero indicia


6) Define a taxes give some examples of taxa at different levels


            Each category referred to as a unit of classification in fact expressive a rank commonly known as taxa


                        Maize (species)

                        Roses (genus)

                        Grasses (family)

                        Conifers (order)

                        Dicot (class)

                        Seed plant (division) etc.


7) Identify the cored order of taxonomical categories


            a) species – order – phylum – kingdom

            b) Genus – species – order – kingdom

            c) species – genus – order – phylum


            Ans. – ©


8)  Try to collect all the currently accepted meaning for the word ‘species ‘Discuss with your teacher the meaning of species in case of higher plants & animals on one hand & bacteria on other hand.


            Try it own.


a) Define

            i) Phylum -      formed of one or more classes e.g. phylum chordate which possess some similar correlated characteristics.


            ii) Class            It is an taxonomic grouping of organisms higher than order & lower than phylum. Class is taxes that canonists of one or more orders of organism all of which possess similar co-related characteristics

                                    e.g. = dicotyledonous.


            Iii )Familly         It is grouping of organisms which are immediately below that of order an above that of genus. Family is a taxonomic factory that consists of one or more genera of organisms all of which have some comm. co-related characters not found in genera of other orders e.g. = felids.


            iv) order                     It is a grouping of organisms higher man family & lower than class. It has make than one family of organisms all of which possess some specific co-related characters not found in other

                                    e.g. = carnivore.


          v) genus                      It is below family. Which possess grouping of organisms having one or more species all of which having common once try & other co-related characters?

                                     E.g. – ponthera.


10) Now is a key helpful in the identification & classifications of an organism?


            It is beepfulin Classification _ It is helpful for the knowing of phylum/division class, order, family of me organism in each symptom of classification. With their keep many organism can be classified.


            B) Identifications       It is are din knowing the genus name of species. If the organism is not already recorded efforts are made first to check & recheck about its discovery & then given it a new name


11) Illustrate the taxonomical hierarctly with suitable examples of plant & animal


                                                Human                                    plant

kingdom                                 animalia                                  plantae

Division                                   chordate                                 angiosperms

Class                                        Mammaca                              dicolylldoonal

Order                                      primate                                   sapindales

Family                                     homonidal                              anacardiaceal

Genus                                      hormo                                     mongifera

Species                                    sapiens                                    indico 
Written By Badal Paul
The author is a passionate blogger, writer and educationalist. This blog is created to ease troubles of the Cbse students. The author holds multiple blogs and the writer of the Novel KALCHAKRA, OOM AND THE CHOSEN FIVE.