The age of rock is calulated on the basis of
Types of fossils present
Number of strata present
Amount of uranium present
Amount of lead present
It's Obvious
Swan-necked flask experiment proved
Assertion : The earliest organisms that appeared on the earth were non-green and presumably anaerobes.
Reason :The first autotrophic organisms were the chemoautotrophs that never released oxygen.
Large size of pinnae in animals of warm region in comparison to animal of cold region is due to
According to Darwin, the organic evolution is due to
