The fossil record of blue-green algae is foun | vedclass

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(B) Blue-green algae (Cyanobacteria) are among the oldest known life forms on Earth.Fossil evidence of these organisms has been discovered in rocks da

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Pre-palaeozoic

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(B) Blue-green algae (Cyanobacteria) are among the oldest known life forms on Earth.Fossil evidence of these organisms has been discovered in rocks dating back to the Pre-palaeozoic era (specifically the Precambrian period).These ancient fossils,known as stromatolites,provide evidence of photosynthetic life existing billions of years ago.

Column-$I$	Column-$II$
$(X)$ Earth	$(1)$ $20$ billion years
$(Y)$ Universe	$(2)$ $4.5$ billion years
$(Z)$ Non-cellular life	$(3)$ $3.0$ billion years

The fossil record of blue-green algae is found in which era?

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Match the following columns:
Column-$I$ Column-$II$
$(X)$ Earth $(1)$ $20$ billion years
$(Y)$ Universe $(2)$ $4.5$ billion years
$(Z)$ Non-cellular life $(3)$ $3.0$ billion years

The presence of $NaCl$ in body fluids indicates that life originated in:

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