<span>Our biosphere is the global sum of all ecosystems. It can also be called the zone of life on Earth, a closed (apart from solar and cosmic radiation) and self-regulating system. Geology studies the Earth, and has tendrils in all ecosystems, thus the connection to the biosphere.</span>
seven species of dolphins
D. is the correct answer. It uses neurons to signal.
Hi there! I hope I'm not late. The answer is D and E. I just got it right. Hope this helps ;)
