How did George Cuvier accounts for the extinctions in nature
Extinctions never occur there are unexplored parts of the globe where the organisms that appears to have gone extinct may still live
Extinctions occur when the slow adaptations of the organisms overtime to their environment are not quick enough to help them respond to changing conditions
Extinctions occur at random, they do not reflect God’s will
Extinctions occur due to the catastrophic events
Related Questions
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
Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life?
They could maintain an internal environment different from their surroundings
They were able to grow in size by taking up material from the surroundings
They showed budding or splitting to give rise to similar smaller structures
They had a defined, organized, and heritable mechanism of reproduction
The Miller-Urey experiment provided evidence for which stage of the origin of life?
Formation of the first cells
Evolution of photosynthesis
Abiotic synthesis of organic monomers
Development of self-replicating molecules
Experimental evidence of chemical evolution was given by
Miller
Haldane
Oparin
All of the above
According to one of the most accepted theory, the earth atmosphere before any life had originated consists of and
None of these
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
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 first non-cellular form of life could have originated
3 billion years back
2 billion years back
4 billion years back
1 billion years back
According to abiogenesis, life originated from
Non-living
Pre-existing life
Chemicals
Extra-terrestrial matter
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
