Nymph of cockroaches

(1) A larval stage

(2) Undergo 18 molting

(3) Have wing pads in all stages

(4) Proof of paurometabolous Development

Subtopic:  Cockroach: Female Reproductive System (OLD NCERT) |
 71%
From NCERT
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If during development of P. americana total 39 molting were observed of different sequential stages, then how many eggs were there?

(1) 3

(2) 13

(3) 6

(4) 9

Subtopic:  Cockroach: Female Reproductive System (OLD NCERT) |
 79%
From NCERT
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Cockroaches are

(1) Vector for bacterial disease

(2) Of no economic importance

(3) Bisexual

(4) More than one option is correct

Subtopic:  Cockroach: Intro & External Morphology (OLD NCERT) |
 80%
From NCERT
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Vestibulum is a part of

(1) Genital chamber of female cockroach

(2) Genital pouch of female cockroach

(3) Both a and b

(4) Rudimentary part of female circulatory system in cockroach

Subtopic:  Cockroach: Female Reproductive System (OLD NCERT) |
From NCERT
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Assertion  :      The development in cockroach is heterometabolous metamorphosis.

Reason     :      Young ones resemble the adults in all characters.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Cockroach: Female Reproductive System (OLD NCERT) |
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Assertion    :       Muscle fibres are said to be contractile in nature.

 Reason      :       Cells of muscle tissues can shorten forcefully and again return to the relaxed state.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Animal Tissue: Muscle Types & Skeletal Muscles |
 78%
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Assertion   :       Blood can be coagulated by adding oxalate (Sodium or Potassium Oxalate) to it.

Reason      :       Oxalate depresses the action of anticoagulant present in the blood.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Connective Tissue |
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Assertion   :       Thigh muscles can get tired but not the muscles of ventricle of heart.

Reason      :       Muscles of thigh are voluntary whereas that of heart are involuntary muscles.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Animal Tissue: Muscle Types & Skeletal Muscles | Cardiac Muscle & Smooth Muscle |
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Assertion   :       Smooth muscle fibres do not appear to be striated.

Reason      :       This is due to regular alternate arrangement of thick and thin filaments is smooth muscle fibre.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Cardiac Muscle & Smooth Muscle |
 59%
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Assertion   :       Intercalated discs are important regions of cardiac muscle cells.

Reason      :       Intercalated discs function as boosters for muscle contraction waves.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Cardiac Muscle & Smooth Muscle |
 71%
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