Q. No.How many molting will be observed in the case of female cockroaches for 20 eggs thinking that all will be converted in adults?
(1) 260
(2) 120
(3) 130
(4) 660
(1) 260
(2) 120
(3) 130
(4) 660
Nymph of cockroaches
(1) A larval stage
(2) Undergo 18 molting
(3) Have wing pads in all stages
(4) Proof of paurometabolous Development
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
Cockroaches are
(1) Vector for bacterial disease
(2) Of no economic importance
(3) Bisexual
(4) More than one option is correct
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
Assertion : The development in cockroach is heterometabolous metamorphosis.
Reason : Young ones resemble the adults in all characters.
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.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
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.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
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.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
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.
- If both the assertion and the reason are true and the reason is a correct explanation of the assertion
- If both the assertion and reason are true but the reason is not a correct explanation of the assertion
- If the assertion is true but the reason is false
- If both the assertion and reason are false
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