Question:medium

Arrange the landmarks in the evolution of life on the earth.
A. Formation of oceans and continents.
B. Diversification of multicellular eukaryotes.
C. Appearance of protists, the first eukaryotes.
D. Appearance of endosymbionts (mitochondria).
E. Appearance of aerobic bacteria development of O\(_2\) - rich atmosphere.
Choose the correct answer from the options given below :

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A simple evolutionary timeline mnemonic: Abiotic (Oceans) \(\rightarrow\) Prokaryotes \(\rightarrow\) Oxygen Crisis \(\rightarrow\) Eukaryotes (Nucleus then Mitochondria) \(\rightarrow\) Multicellularity.
Updated On: Jul 31, 2026
  • A, D, C, B, E
  • D, B, C, A, E
  • C, D, B, A, E
  • A, E, C, D, B
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The Correct Option is D

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