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NEET - September 2020 Previous Year Questions



NEET Biology Previous Year Questions - September 2020

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 pairs is of unicellular algae?

[class-xi ]

  • Laminaria and Sargassum
  • Gelidium and Gracilaria
  • Anabaena and Volvox
  • Chlorella and Spirulina
    • Correct Option: D  [ Chlorella and Spirulina ]

    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:

Match the following columns and select the correct option.

Column-I Column-II
(A)Gregarious, polyphagous pest (I)Asterias
(B)Adult with radial symmetry and larva with bilateral symmetry (II)Scorpion
(C)Book lungs (III)Ctenoplana
(D)Bioluminescence (IV)Locusta

[class-xi ]

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

    Remark:

Identify the incorrect statement.

[class-xi ]

  • Heart wood does not conduct water but gives mechanical support.
  • Sapwood is involved in conduction of water and minerals from root to leaf.
  • Sapwood is the innermost secondary xylem and is lighter in colour.
  • Due to deposition of tannins, resins, oils etc., heart wood is dark in colour.
    • Correct Option: C  [ Sapwood is the innermost secondary xylem and is lighter in colour. ]

    Remark:

The roots that originate from the base of the stem are:

[class-xi ]

  • Fibrous roots
  • Primary roots
  • Prop roots
  • Lateral roots
    • Correct Option: A  [ Fibrous roots ]

    Remark:

Ray florets have:

[class-xi ]

  • Inferior ovary
  • Superior ovary
  • Hypogynous ovary
  • Half inferior ovary
    • Correct Option: A  [ Inferior ovary ]

    Remark:

The ovary is half inferior in:

[class-xi ]

  • Brinjal
  • Mustard
  • Sunflower
  • Plum
    • Correct Option: D  [ Plum ]

    Remark:
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NEET Biology Previous Year Questions (PYQs)