Question

$\mathfrak \purple{explain}$


Describe classification of kingdom animalia. Mention one characteristic and one example of each class.


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Write down in own words. ​

Answer 1

$\underline \mathbb{ANSWER}$

$\bold{\fbox{\color{Red}{Phylum-Porifera}}}$

》Members of this Phylum are commonly known as sponges and are generally Marine and asymmetrical.

$\bold{\fbox{\color{Red}{Phylum-Coelentrata}}}$

》They are aquatic , mostly Marine, sessile or free swimming radially symmetrical animals.

$\bold{\fbox{\color{Red}{Phylum-Ctenophora}}}$

》 Ctenophores is commonly known as sea walnut or comb-jellies exclusively marine, radially symmetrical, triploblastic organism with tissue level of organisation.

$\bold{\fbox{\color{Red}{Phylum-Platyhelminthes}}}$

》 They have dorso-ventrally flattened body hence, are called flatworms. They are mostly endoparasites found in animals including human beings.

$\bold{\fbox{\color{Red}{Phylum-Aschelminthes}}}$

》 The body of aschelminthes is circular in cross section and hence, the name roundworms. They have organ system level of body organisation.

$\bold{\fbox{\color{Red}{Phylum-Annelida}}}$

》They maybe aquatic and Terrestrial, free living and sometimes parasitic. They exhibit organ system level of body organisation and bilateral symmetry.

$\bold{\fbox{\color{Red}{Phylum-Arthropoda}}}$

》This is the largest Phylum of animalia which includes insects . They are bilaterally symmetrical , triploblastic , segmented and coelomate animals.

$\bold{\fbox{\color{Red}{Phylum-Mollusca}}}$

》This is the second largest animal Phylum.They are Terrestrial or aquatic having an organ system level of organisation.

$\bold{\fbox{\color{Red}{Phylum-Echinodermata}}}$

》 These animals have an endoskeleton of calcareous ossicles and hence the name echinodermata. All are marine with organ system level of organisation.

$\bold{\fbox{\color{Red}{Phylum-Hemichordata}}}$

》Hemichordata was earlier considered as a sub-Phylum under Phylum chordata but now it is placed as separate Phylum under non chordata.

$\bold{\fbox{\color{Red}{Phylum-Chordata}}}$

》Animals belonging to Phylum chordata are fundamentally characterized by the presence of a notochord, a dorsal hollow nerve cord and paired parapharyngeal gill slits.

$\bold\green{\underline{Class:Cyclostomata}}$

》All living members of this class cyclostomata are ectoparasites on some fishes. They have an elongated body bearing 6 - 15 pairs of Gill slits for respiration.

$\boxed {EXAMPLE:-}$

~Petromyzon , Myxine

$\bold\green{\underline{Class:Chondrichthyes}}$

》 They are marine animals with streamlined body and have cartilaginous endoskeleton.

$\boxed {EXAMPLE:-}$

~Scoliodon , Pristis

$\bold\green{\underline{Class:Osteichthyes}}$

》It includes both Marine and freshwater fishes with Bony endoskeleton. Their body is streamlined.

$\boxed {EXAMPLE:-}$

~ Labeo, Betta

$\bold\green{\underline{Class:Amphibia}}$

》Amphibia can live in aquatic as well as Terrestrial habitats. Most of them have two pairs of limbs.

$\boxed {EXAMPLE:-}$

~ Bufo , Rana

$\bold\green{\underline{Class:Reptilia}}$

》This class has creeping or crawling mode of locomotion. They are mostly Terrestrial animals and their body is covered by dry and cornified skin , epidermal scales or scouts.

$\boxed {EXAMPLE:-}$

~Chelone , Chameleon

$\bold\green{\underline{Class:Aves}}$

》A characteristic feature of aves is the presence of feathers and most of them can fly except flightless birds.

$\boxed {EXAMPLE:-}$

~ Corvus , Columba

$\bold\green{\underline{Class:Mammalia}}$

》 They are found in a variety of habitats polar , ice caps, desert , mountain, forest Grassland and dark caves. Some of them have adapted to fly or live in water . The most unique mammalian characteristic is the presence of milk producing glands by which the young ones are nourished.

$\boxed {EXAMPLE:-}$

~ Felis , Elephas

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NOTE:

REFER TO ATTACHMENT

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Answer 2

$\huge{\underline{\mathfrak{\pink{Answer}}}}$

PHYLUM:

The various phylums in kingdom animalia are:

1) Porifera - Sycon

2) Coelentrata - Physalia

3) Ctenophora - Pleurobrachia

4) Platyhelminthes - Taenia

5) Aschelminthes - Ascaris

6) Annelida - Nereis

7) Arthropoda - Anopheles

8) Mollusca - Pila

9) Echinodermata - Asterias

10) Hemichordata - Balanoglossus

11) Chordata

Sub phyla:

• Urochordata
• Cephalochordata
• Vertebrata

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CLASS:

1) Cyclostomata : They have a sucking and circular mouth without Jaws

Eg : Lamprey

2) Chondrichtyes : Teeth are modified placoid scales which are backwardly directed. Their jaws are very powerful.

Eg : Trygon

3) Osteichythyes : Air bladder is present which regulate buoyancy and heart is two chambered.

Eg: Hippocampus

4) Amphibia : The heart is three chambered and they are cold blooded animals.

Eg: Tree frog.

5) Reptilia : Snakes and lizards shed their scales as skin cast and fertilization is internal.

Eg : Cobra

6) Aves : Heart is completely four chambered and they are warm blooded animals.

Eg : Pavo

7) Mammalia : The skin of mammals is unique in possessing hair.

Eg : Panthera leo

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