Subject

Biology

Class

NEET Class 12

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 Multiple Choice QuestionsMultiple Choice Questions

1.

As per classification which of the following is correct ?

  • Ascaris, Pheretima, Grasshopper

  • Hydra, Pterido, Leucosolenia

  • Starfish, Grasshopper, Solen

  • Pila, Dentalium, Octopus


D.

Pila, Dentalium, Octopus

Out of all the options, last option is correct as Pila globosa or Apple snail, Dentalium or Tusk shell and Octopus or Devil fish all belong to Phylum- Mollusca.


2.

Commercial silk is obtained from :

  • cocoon/ pupa

  • caterpiller

  • adult moth

  • both egg and adult moth


A.

cocoon/ pupa

Commercial silk is obtained by putting cocoons i.e. caterpiller covered by silk thread) in hot water or treating them with fumigation. The pupae are killed and the cocoons are assorted according to their colours. After assorting the thread is first unwinded and then winded with the help of wheels.


3.

Continuous bleeding from an injured part of body is due to deficiency of :

  • Vitamin A

  • Vitamin B

  • Vitamin K

  • Vitamin E


C.

Vitamin K

Vitamin K is essential for normal blood clotting. Its deficiency leads to slow rate of blood clotting, because formation of prothrombin in liver is adversely affected in absence of adequate amount of vitamin K.


4.

In which of the following class of Annelida, one pair ovaries and several pair testes are found ?

  • Archiannelida

  • Hirudinea

  • Oligochaeta

  • Polychaeta


B.

Hirudinea

Hirudinaria belongs to Class- Hirudinea. It consists of 11 pairs of testis sacs in segment 12 to 22 and 1 pair of globular ovisacs enclosing coelomic spaces and an ovary in each.


5.

Which of the following is a coelenterate ?

  • Sea lily

  • Sea squirt

  • Sea cucumber

  • Sea fan


D.

Sea fan

Sea fan or Gorgonia is a coelenterate and sea squirt or Herdmania belongs to urochordata. Sea lily or Antedon and Sea cucumber (Holothuria) belongs to Phylum- Echinodermata.


6.

Kaziranga National Park is famous for :

  • Rhinoceros

  • Tiger

  • Asiatic lion

  • Nilgai


A.

Rhinoceros

Kaziranga National Park is famous for one horned Rhinoceros. It is situated at Sibsagar district in Assam.


7.

The universal recipient blood group is :

  • O (+ ve)

  • AB (+ ve)

  • O (- ve)

  • AB (- ve)


B.

AB (+ ve)

According to Landsteiner and Decastello four types of blood groups (A, B, AB and O) are found in humans. Landsteiner and Veiner (1940) also discovered Rh factor which is represented by +ve  or -ve mark. AB (+ve) is the universal recipient blood group and O (+ve) is the universal donor blood group.


8.

All worms are :

  • triploblastic

  • segmented

  • endo-parasites

  • free - living


A.

triploblastic

All worms which belongs to phylum Platyhelminthes and Aschelminthes are triploblastic i.e. body is composed of three primary germ layers, namely, ectoderm, mesoderm and endoderm. These may be either endo-parasites or exo-parasites and generally devoid of body segmentation.


9.

Pearl oyster is a mollusc which belongs to class :

  • Cephalopoda

  • Pelecypoda

  • Scaphopoda

  • Gastropoda


B.

Pelecypoda

Pinctada is commonly called Indian pearl oyster. Oyster's shell secretes pearls, whenever any organism enters the shell and causes irritation. Pinctada belongs to Phylum-Mollusca and Class Pelecypoda.


10.

Hydrophytes are characterised by :

  • thick and large leaf

  • delicate and mucilagenous stem

  • short spinous stem

  • all of the above


B.

delicate and mucilagenous stem

Hydrophytes are the plants that grow only in or on water. In these plants, stem is long, slender, spongy and flexible often covered with mucilage.