A closed system is one which
Continuously exchange matter and energy with the surrounding
Cannot exchange matter and energy with the surrounding
Can exchange energy but not matter with the surrounding
None of these
Which of the following theory is related to transfer of life from one planet to another?
Krebs' cycle, glycolysis, lipogenesis, enzymes, all of these indicates
The greatest evolutionary change enabling the land vertebrates to be completely free from the water. Habitat was the development of