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81. Which of the following is in the correct sequential order in which these appeared under stimulated primitive earth condition ?
A. Methane, hydrogen cyanide, nitriles, amino acids
B. Amino acids, nitriles, hydrogen cyanide, methane
C. Nitriles, amino acids, methane, hgydrogen cyanide
D. Hydrogen eyanide, methane, nitriles, amino acids
Explanation:
82. Which of the following is the correct sequence in which the given animal groups appeared on the earth during the course of evolution ?
A. Porifera-Annelida-Coelenterata-Protozoa
B. Protozoa-Coelenterata-Porifera-Annelida
C. Annelida-Porifera-Protozoa-Coelenterata
D. Protozoa-Porifera-Coelenterata-Annelida
Explanation:
83. Which era is known as the Golden Age of Reptiles due to the dominance of Dinosaurs over all possible habitats on Earth ?
A. Precambrian
B. Mesozoic
C. Cenozoic
D. None of these
Explanation:
84. The scientific study of ageing is known as
A. Etiology
B. Gerantology
C. Osteology
D. Teratology
Explanation:
85. The first organisms on earth were
A. autotrophs
B. heterotrophs
C. saprotrophs
D. None of these
Explanation:
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