Assignment 21 for 9th ( contributors Kanishk 9th F , yukti thakral 9-c )

DIVERSITY IN LIVING ORGANISMS

Q1-What is classification? Write its importance.

Ans-Classification is the method of grouping according to the characteristics and attributes in order to simplify it.

Importances of classification are:

   It makes the study of organisms easy.

   It helps to understand inter relationships among different groups of organisms.

   It also helps to compare and study the evolution of organism according to their hierarchy.

   Every field of biology depends upon classification in some way or other.

Q2-Differentiate between gymnosperms and angiosperms?

Q1  Explain criteria  of classification of  5  kingdoms .

1)    KINGDOM  MONERA

§  Cell  structure  =  Unicellular Prokaryotic  in  nature

§  Nutrition= Autotrophic and heterotrophic

§  Cell wall= It is absent

§  Examples = blue-green algae , bacteria , Mycoplasma

2)    KINGDOM  PROTISTA

·        Cell structure= Unicellular  eukaryotes in nature

·        Nutrition= Photosynthetic

·        Cell wall=Some  protists have and some do not have

·        Examples=Euglena , protozoans

3)    KINGDOM  FUNGI

§  Cell  structure= Multicellular in nature

§  Nutrition=Heterotrophic , absorptive

§  Cell wall= Chitinous  cell  wall

§  Examples=Yeast moulds ,  mushroom

4)    KINGDOM  PLANTAE

·        Cell structure=Eukaryotes

·        Nutrition=Autotrophs

·        Cell wall=Cellulose 

·        Examples=Algae , ferns

5)    KINGDOM ANIMALIA

§  Cell  structure=Multicellular

§  Nutrition=Heterotrophic

§  Cell wall=Not present

§  Examples=Sponges , invertebrates , vertebrates

Gymnosperms	Angiosperms
Gymnosperms are seed- bearing, non-flowering plants.	Angiosperms are flowering plants.
They are more primitive than Angiosperms.	They are the most recent and highly developed group of plants
Seeds are produced naked i.e., they are not enclosed inside the fruit.	Seeds are enclosed inside the fruit.