Arrange these evolutionary events chronologically: A. First eukaryotes B. First prokaryotes C. Multicellularity D. Oxygen accumulation
B -> D -> A -> C
B – The first prokaryotes (simple bacteria-like cells) appeared about 3.5–3.8 billion years ago.
D – Cyanobacteria carried out oxygenic photosynthesis, leading to oxygen accumulation in the atmosphere in the Great Oxidation Event about 2.4 billion years ago.
A – The first eukaryotes (cells with a nucleus and mitochondria, which need oxygen) appeared about 1.8–2 billion years ago.
C – Multicellular organisms evolved later from eukaryotes, roughly 1.5 billion to 600 million years ago.
Hence, the chronological order is B -> D -> A -> C.
Important Questions from Diversity-Living Organism
Flemings "Left hand Rule" is associated with the effect of
Ornithophily is effected by
- Which of the following organisms exhibits both autotrophic and heterotrophic modes of nutrition?
- Which class of vertebrates possesses cold-blooded characteristics and scaly skin?
In unicellular organisms, all functions like digestion, respiration and reproduction are performed by how many cell(s)?
