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NEET Zoology MCQs: Class-XI and Class-XII



NEET Zoology MCQs: Class-XI and Class-XII

Which of the following is incorrect about Cynobacteria?

[class-xi ]

  • They are photoautotrophs
  • They lack heterocysts
  • They often form blooms in polluted water bodies
  • They have chlorophyll A similar to green plants
  • Correct Option: B  [ They lack heterocysts ]

    Remark:

The size of Pleuropneumonia - like Organism (PPLO) is:

[class-xi ]

  • 0.02 µm
  • 1-2 µm
  • 10-20 µm
  • 0.1 µm
  • Correct Option: D  [ 0.1 µm ]

    Remark:

Which of the following statements about inclusion bodies is incorrect ?

[class-xi ]

  • They are not bound by any membrane.
  • These are involved in ingestion of food particles.
  • They lie free in the cytoplasm.
  • These represent reserve material in cytoplasm.
  • Correct Option: B  [ These are involved in ingestion of food particles. ]

    Remark:

Which of the following options does correctly represent the characteristic features of phylum Annelida?

[class-xi ]

  • Triploblastic, unsegmented body and bilaterally symmetrical.
  • Triploblastic, segmented body and bilaterally symmetrical.
  • Triploblastic, flattened body and acoelomate condition.
  • Diploblastic, mostly marine and radially symmetrical.
  • Correct Option: B  [ Triploblastic, segmented body and bilaterally symmetrical. ]

    Remark:

Match the following group of organisms with their respective distinctive characteristics and select the correct option :

Organisms Characteristics
(A)Platyhelminthes (I)Cylindrical body with no segmentation
(B)Echinoderms (II)Warm blooded animals with direct development
(C)Hemichordates (III)Bilateral symmetry with incomplete digestive system
(D)Aves (IV)Radial symmetry with indirect development
Choose the correct answer from the options given below:

[class-xi ]

  • (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
  • (A)-(II), (B)-(III), (C)-(IV), (D)-(I)
  • (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
  • (A)-(I), (B)-(II), (C)-(III), (D)-(IV)
  • Correct Option: A  [ (A)-(III), (B)-(IV), (C)-(I), (D)-(II) ]

    Remark:

Match the following columns and select the correct option:

Column - I Column - II
(A)Aptenodytes (I)Flying fox
(B)Pteropus (II)Angel fish
(C)Pterophyllum (III)Lamprey
(D)Petromyzon (IV)Penguin

[class-xi ]

  • (A)-(III), (B)-(IV), (C)-(II), (D)-(I)
  • (A)-(III), (B)-(IV), (C)-(I), (D)-(II)
  • (A)-(IV), (B)-(I), (C)-(II), (D)-(III)
  • (A)-(II), (B)-(I), (C)-(IV), (D)-(III)
  • Correct Option: C  [ (A)-(IV), (B)-(I), (C)-(II), (D)-(III) ]

    Remark:

All vertebrates are chordates but all chordates are not vertebrates, why?

[class-xi ]

  • Notochord is replaced by vertebral column in adult of some chordates.
  • Ventral hollow nerve cord remains throughout life in some chordates.
  • All chordates possess vertebral column.
  • All chordates possess notochord throughout their life.
  • Correct Option: A  [ Notochord is replaced by vertebral column in adult of some chordates. ]

    Remark:

Bilaterally symmetrical and acoelomate animals are exemplified by:

[class-xi ]

  • Ctenophora
  • Platyhelminthes
  • Aschelminthes
  • Annelida
  • Correct Option: B  [ Platyhelminthes ]

    Remark:

Which of the following statements are true for the phylum-Chordata?
(A) In Urochordata notochord extends from head to tail and it is present throughout their life.
(B) In Vertebrata notochord is present during the embryonic period only.
(C) Central nervous system is dorsal and hollow.
(D) Chordata is divided into 3 subphyla : Hemichordata, Tunicata and Cephalochordata.

[class-xi ]

  • (D) and (C)
  • (C) and (A)
  • (A) and (B)
  • (B) and (C)
  • Correct Option: D  [ (B) and (C) ]

    Remark:

Match the following columns and select the correct option.

column-I column-II
(A)6 - 15 pairs of gill slits (I)Trygon
(B)Heterocercal caudal fin (II)Cyclostomes
(C)Air Bladder (III)Chondrichthyes
(D)Poison sting (IV)Osteichthyes

[class-xi ]

  • A-II, B-III, C-IV, D-I
  • A-III, B-IV, C-I, D-II
  • A-IV, B-II, C-III, D-I
  • A-I, B-IV, C-III, D-II
  • Correct Option: A  [ A-II, B-III, C-IV, D-I ]

    Remark: