The Miller-Urey experiment attempted to simulate early Earth conditions to test the chemical origin of life. Which of the following gaseous components was NOT included in their experimental setup, despite being potentially present in the early atmosphere?
Methane ()
Ammonia ()
Water vapor ()
Oxygen ()
Related Questions
A microsphere is a …A… collection of organic macromolecules with double layered outer boundary. The term microsphere was given by …B…
Complete the given statement by choosing correct options for A and B with reference to NCERT textbook
A-non-living, B-Sydney Fox
A-living, B-Oparin
A-non-living, B-Haldane
A-living, B-Altman
Life appeared
500 million years after the formation of earth
600 million years after the formation of earth
Four billion years back
Both (1) and (3)
A microsphere is a …A… collection of organic macromolecules with double layered outer boundary. The term microsphere was given by …B…
Complete the given statement by choosing correct options for A and B with reference to NCERT textbook
A-non-living, B-Sydney Fox
A-living, B-Oparin
A-non-living, B-Haldane
A-living, B-Altman
The gases condensed under …A… and formed the galaxies of the present day universe. In the solar system of the milky way galaxy, earth was supposed to have been formed about …B… back. There was no atmosphere …C… on the earth. Water vapour, …D… carbon dioxide and ammonia released from molten mass covered the surface.
Choose the correct option for A, B, C and D to complete the given paragraph with reference to NCERT textbook
A-Gravitation, B-4.5 billion years, C-Early, D-Methane
A-Acceleration, B-4.5 billion years, C-Early, D-Methane
A-Acceleration, B-4.5 billion years, C-Early, D-Ethane
A-Gravitation, B-4.5 billion years, C-Early, D-Ethane
The …A… from the sun broke up water into hydrogen and oxygen and the …B… escaped. Oxygen combined with ammonia and methane to form …C… . CO and others. The ozone layer was formed. As it cooled, the water vapour fell as rain, to fill all the depressions and form …D… Choose the correct option for A,B,C and D to complete the given paragraph, to NCERT textbook
A-IR rays, B-lighter , C-water, D-oceans
A-UV rays, B-lighter , C-water, D-oceans
A-UV rays, B-heavier , C-water, D-oceans
A-UV rays, B-heavier , C-water, D-oceans
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 experiment suggested that simplest living organisms could not have originated spontaneously from non-living matter?
Microbes did not appear in stored meat
Larvae could appear in decaying organic matter
Microbes appeared from unsterilized organic matter
Meat was not spoiled, when heated and kept sealed in a vessel
According to the heterotroph hypothesis, the first life on the earth was able to
Synthesis its food from inorganic compounds
Feed upon carbohydrates produced by autotrophs
Feed upon available nutrients in the environment
Carry on photosynthesis instead of respiration
What happened to present in the primary atmosphere during its conversion to the secondary atmosphere?
It got oxidized to and water
It was absorbed by photoautotrophs
Most of it got oxidized to nitrogen oxides
It concentration was decreased due to formation
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
