- (A) RNA non-enveloped
- (B) RNA enveloped
- (C) DNA non-enveloped
- (D) DNA enveloped
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- (A) Sterilization
- (B) Disinfection
- (C) Antisepsis
- (D) Preservation
- (A) All RNA viruses
- (B) All DNA viruses
- (C) All retroviruses
- (D) All viruses
- (A) Older sediment layers have equal amount of these reaioactive isotopes as that of the young ones
- (B) Older sediment layers have less amount of these reaioactive isotopes as that of the young ones.
- (C) Older sediment layers have greater amount of these radioactive isotopes as that of the young ones.
- (D) Older sediment layers did not have these radioactive isotopes
- (A) Alveoli
- (B) Air sacs
- (C) Bronchi
- (D) Parabronchi
- (A) Crustacean
- (B) Insecta
- (C) Arachnida
- (D) Myriapoda
- (A) Carotenes
- (B) Carotenoids
- (C) Xanthophylls
- (D) Chlorophyll
- (A) Flatworm
- (B) Pinworm
- (C) Hook worm
- (D) Tapeworm
- (A) Newts
- (B) Varanope
- (C) Dipnoi
- (D) Hagfishes
- (A) Observation?hypothesis?law?theory
- (B) Observation?hypothesis?deduction?testing of deduction
- (C) Hypothesis?observation?deduction?testing of deduction
- (D) law?theory?deduction?observation

