Multiple Choice Questions

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Bacteria are considered plant because they

  • are green in colour

  • have rigid cell wall

  • have chlorophyll

  • have stomata


B.

have rigid cell wall

Presence of cell wall is the main characteristic of plants. Therefore, in bacteria, presence of rigid cell wall makes it to be a plant.

Other features such as, presence of stomata, cholorophyll and green colour does not indicate the group to be classified as plant. Eg. chlorophyll is absent in fungi, stomata is absent in algae.


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Which of the following is a respiratory disease?

  • Polio

  • Arthritis

  • Asthma

  • Cancer


Sciatic vein of frog opens in

  • heart

  • kidney

  • pelvic region

  • liver


Which of the following have notochord throughout life?

  • Birds

  • Fish

  • Snake

  • Amphioxus


First National Park developed in India is

  • Gir

  • Kaziranga

  • Jim Corbett

  • None of these


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During unfavourable conditions, the sponges form

  • cyst

  • encyst

  • spicule

  • Gemmule


Tree of life is

  • arbor vitae

  • pons Varolii

  • organ of Corti

  • diencephalon


Which is common between earthworm, leech and centipede?

  • They have Malphigian tubules

  • They are hermaphrodite

  • They have ventral nerve cord

  • None of the above


Eustachian canal connects

  • middle ear with external ear

  • middle ear with internal ear

  • external ear with internal ear

  • pharynx with middle ear


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Shell of molluscs is derived from

  • foot

  • mantle

  • ctenidia

  • placoid