Name the biggest animal and the tallest tree.


Blue whale is 30 metre long and largest animal.

Redwood trees of California are 100 metre tall and are longest tree.

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Why do we classify organisms?


We classify organisms due to the following reasons :

(i) Classification makes the study of huge varieties of organisms easy.

(ii) The study of a few representatives from each distinct group helps us to integrate the idea of life as a whole.

(iii) It reveals the relationships among various groups of organisms.

(iv) It provides information about plants and animals, which occur in specific geographical regions.

(v) It indicates the evolutionary relationship by establishing the gradually increasing complexity of form and structure in different groups of organisms.

 

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Write down the hierarchic categories which are generally used for classification of animals.



The hierarchial categories are -:

(i) Kingdom. Plant kingdom and animal kingdom.

(ii) Phylum (for animals)/Division (for plants). A group of closely related classes having certain common characters.

(iii) Class. A group of closely related orders having certain common characters.

(iv) Order. A group of closely related families having certain common characters.

(v) Family. A group of closely related genus having certain common characters.

(vi) Genus. A group of closely related species have certain common characters.

(vii) Species. A group of organisms which are similar enough to breed and perpetuate.

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What are the characteristics of kingdom protista? Give examples.


Characteristics of Kingdom Protista:

(i) They are unicellular eukaryotic organism i.e., they have membrane bound nucleus and organelles.

(ii) Some of these organism use appendages such as hair like cilia or whip-like flagella for moving around.

(iii) Their mode of nutrition can be autotrophic or heterotrophic.

Examples:Unicellular algae (like Chlamydomonas, Chlorela), diatoms and protozoans like amoeba.

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What are the characteristic of kingdom Monera?


Characteristics of kingdom Monera:

(i) The organism do not have clearly defined nucleus i.e., nucleus is not enclosed in nuclear membrane.

(ii) Cell organelles are not covered with a membrane.

(iii) Organisms do not show multicellular body design i.e., they are unicellular.

(iv) Some organisms have cell wall other do not have cell wall.

(v) The mode of nutrition may be autotrophic (synthesising their own food) or heterotrophic (getting food from the environment).


Characteristics of kingdom Monera:
(i) The organism do not have
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List the names of five kingdom of organism. What type of organisms they composed of?


Kingdom

Type of Organisms

1. Monera

Bacteria and Cyanobacteria

2.Protista

Bacteria and Cyanobacteria

3. Fungi

Lack chlorophyll and obtain their food through absorption.

4.Plantae 

All photosynthetic green plants. 

5. Animalia

It is the kingdom of multicellular consumers

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