1. Cat, Rat and Bat belong to same class Mammalia, phylum Chordata. The common characters of these animals are (i) Hair; (ii) Mammary glands; (iii) Integumentary glands, e.g., sweat glands; (iv) Seven cervical vertebrae; (v) Diaphragm; (vi) Four chambered heart, (vii) External pinnae; (viii) Vivipary.

    Cat, Rat and Bat belong to same class Mammalia, phylum Chordata. The common characters of these animals are (i) Hair; (ii) Mammary glands; (iii) Integumentary glands, e.g., sweat glands; (iv) Seven cervical vertebrae; (v) Diaphragm; (vi) Four chambered heart, (vii) External pinnae; (viii) Vivipary.

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  2. Differentiate between flying lizard and Bird. Flying lizard:- 1. It belongs to class Reptilia of phylum Chordata. 2. The animal is cold blooded. 3. Its heart is three chambered. 4. Feathers are absent. 5. Jaws have teeth. 6. It has normal fore limbs. 7. A patagium is present for helping in gliding (Read more

    Differentiate between flying lizard and Bird.
    Flying lizard:-
    1. It belongs to class Reptilia of phylum Chordata.
    2. The animal is cold blooded.
    3. Its heart is three chambered.
    4. Feathers are absent.
    5. Jaws have teeth.
    6. It has normal fore limbs.
    7. A patagium is present for helping in gliding (Patagium is a fold of skin extending between the forelimbs and hindlimbs of an arboreal animal).
    8. Body is covered by scales.

    Bird:- 1. It belongs to class Aves of phylum Chordata.
    2. The animal is warm blooded.
    3. Its heart is four-chambered.
    4. Feathers are present.
    5. jaws are modified into beak. Teeth are absent,
    6. Its forelimbs are modified into wings.
    7. A patagium is absent.
    8. Scales are restricted to hindlimbs.

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  3. Mango tree is more complex and evolved among bacteria, mushroom and mango tree because of the following characters: 1. Differentiated sporophyte; 2. Vascular tissues (xylem and phloem); 3. Embryo stage in life cycle; 4. Seeds present inside fruit. Bacteria are prokaryotic. Mushroom is eukaryotic (fuRead more

    Mango tree is more complex and evolved among bacteria, mushroom and mango tree because of the following characters:
    1. Differentiated sporophyte; 2. Vascular tissues (xylem and phloem); 3. Embryo stage in life cycle; 4. Seeds present inside fruit. Bacteria are prokaryotic. Mushroom is eukaryotic (fungus) but without any differentiation in body of stem, leaves, roots, absence of vascular tissues and embryonic stage.

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  4. No (l) Leech and Nereis have metameric segmentation (i.e., external segmentation of body corresponding to internal segmentation), closed circulatory system and unjointed appendages. They belong to phylum Annelida. (ii) Scolopendra (centipede), Prawn and Scorpion also have segmented body but they havRead more

    No (l) Leech and Nereis have metameric segmentation (i.e., external segmentation of body corresponding to internal segmentation), closed circulatory system and unjointed appendages. They belong to phylum Annelida.
    (ii) Scolopendra (centipede), Prawn and Scorpion also have segmented body but they have open circulatory system, jointed appendages and chitinous exoskeleton. They belong to phylum Arthropoda.

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  5. (a) Bilateral symmetry. It is a type of body symmetry in which appendages and organs of the body are paired with one of each pair being present in right and left halves of the body. It is an adaptation of motile life style, e.g., Frog/Lizards/Sparrow,/Human being. (b) Coelom. It is a mesoderm lined,Read more

    (a) Bilateral symmetry. It is a type of body symmetry in which appendages and organs of the body are paired with one of each pair being present in right and left halves of the body. It is an adaptation of motile life style, e.g., Frog/Lizards/Sparrow,/Human being.
    (b) Coelom. It is a mesoderm lined, fluid-filled internal body cavity that provides a shock proof environment
    to the contained body organs, e.g., annelids, chordates.
    (c) Triploblastic. They are animals having three germinal layers – outer ectoderm, middle mesoderm and
    inner endoderm, e.g., liver fluke/ Ascaris / Pheretima/house fly/star fish/Amphioxus cat.

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