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