PREVIEW
... /p>
From the earliest algal mats, to terrestrial bryophytes, lycopods and ferns, to the complex gymnosperms and angiosperms, plants developed in five major stages. Over three billion years, the entire plant world evolved through genetic variation and natural selection. From the low level to the high level, from the simple to the complex, new species had been created and adapted to the changing environment, while old species had died out and become extinct.
Throughout the evolution of the ...
YOU MAY ALSO LIKE