You are a part of a group of scientists working on a project called Biosphere 3. The goal of this project is to design a closed ecological system that will support human life. The definition of a closed ecological system is an ecosystem that does not rely on matter exchange with any part outside the system. The purpose of designing this system is that it will have the potential to serve as a life support system in space stations or space habitats (i.e. to colonize Mars.) Your group plans to design and construct a biosphere that they will then live in for the next 2 years. In order to live in this biosphere, it must be completely self- sufficient which means any molecules produced by one species must be used by another.
Which of the following correctly describe how specific types of matter cycle in the biosphere to maintain life. (choose 2)
Which of the following correctly describe how specific types of matter cycle in the biosphere to maintain life. (choose 2)
Oxygen will cycle from humans to plants to breathe in.
Carbon dioxide will be given off by plants for humans to breathe in.
Water will evaporate from the ponds and plants, condensate on the ceiling, then precipitate back down on plants.
Carbon will cycle between humans and plants in the form of carbon dioxide and glucose.
Energy will cycle from the plants to the humans, then back to the plants for growth.
The correct choices are:
1. Oxygen will cycle from humans to plants to breathe in.
2. Carbon will cycle between humans and plants in the form of carbon dioxide and glucose.