Well Water is the Hydrosphere because it contains water, Land and rock is the biosphere, and air is the atmosphere. Those are in three different layers of the Earth. HAPPY TO HELP!
Answer:
Annelids. Worms are the simplest bilaterian animals, and reveal the basic structure of the bilaterian nervous system in the most straightforward way. As an example, earthworms have dual nerve cords running along the length of the body and merging at the tail and the mouth.
The answer is D. receiving blood from the gills
