The first cellular form of life could have originated
$2000$ million years back
$11000$ million years back
$1500$ million years back
$500$ million years back
Did aquatic life forms get fossilised ? If, yes where do we come across such fossils ?
Match the following columns.
Column- $I$ |
Column- $II$ |
$A.$ $500$ million years ago |
$1.$ Sea weeds and few plants |
$B.$ $350$ million years ago |
$2.$ Jawless fishes |
$C.$ $320$ million years ago. |
$3.$ Inverbebrates |
Which phenomena confined the pouched mammals of Australia survived because of lack of competition from any other mammals?
Describe the evolutionary history of plant and vertebrates through geological period.