The classical example of adaptive radiation in development of new species is
Darwin's finches
Marsupials of Australia
Locomotion in Mammals
All of these
What are we referring to ? When we say 'simple organisms' or 'complex organisms'.
The origin of seeds in the land plants was achieved about $345 \;million$ years ago, in lineages recognised as ancestral to all more advanced vascular plants in
A species is taxonomically
Why is nascent oxygen supported to be toxic to aerobic life forms ?