Related Questions
Which of the following was absent in the atmosphere at the time of origin of life ?
The idea that the life originates from pre-existing life is referred as
Biogenesis theory
Special creation theory
Abiogenesis theory
Extraterrestrial theory
Life appeared ________ years after the formation of earth
4.5 billion
1 billion
500 million
2 billion
Which group of organisms is believed to be evolved first on earth?
Arthropods
Coelenterates
Protozoans
Reptiles
Life cannot originate from inorganic material on present earth, because of
High environmental pollution
Very low atmospheric temperature
Large amount of in atmosphere
Absence of appropriate materials
The sequence of origin of life could be
Organic materials → inorganic materials → colloidal aggregate → eobiont → cell
Inorganic materials → organic materials → colloidal aggregate → eobiont → cell
Inorganic materials → organic materials → eobiont → cell → colloidal aggregate
Organic materials → inorganic materials → eobiont → cell → colloidal aggregate
Given below some major events in the early history of life
I. First heterotrophic prokaryotes
II. First eukaryotes
III. First autotrophic prokaryotes
IV. First animals
Choose the correct sequence of these evolutionary events
IV, III, II, I
I, III, II, IV
I, II, III, IV
IV, I, II, III
Which of the following was NOT a necessary step in the origin of life?
Synthesis of organic monomers
Formation of protobionts
Development of photosynthesis
Formation of DNA-based genetic systems
First autotrophs on the primitive earth was/were
Aerobic
anaerobic
Both (1) and (2)
Photosynthetic protist
Arrange the following steps in the origin of life in the correct chronological order:
I. Synthesis of organic polymers
II. Formation of protobionts
III. Formation of DNA-based genetic systems
IV. Synthesis of organic monomers
I, II, III, IV
IV, I, II, III
II, III, I, IV
III, I, II, IV
