Carbon dioxide (CO2) and Oxygen(O2)
O2 in and CO2 out for animals, and the opposite for plants.
Columbian exchange
Columbian Exchange
I think it is columbian exchange
It was named after Christopher Columbus whose voyages marked its beginning.
Animals breathe out carbon dioxide, which is used by plants during photosynthesis to produce oxygen and glucose. This exchange of gases between animals and plants is essential for the Earth's ecosystem.
The era where many plants, animals, diseases, and people were exchanged between the Old World and New World was called the Columbian Exchange.
Colombian exchange
The Columbian Exchange was the exchange of American and European animals, plants, and diseases.
The Columbian Exchange was the exchange of American and European animals, plants, and diseases.
Exploration aided greatly in the exchange of plants and animals. For instance, when the English first came to North America, they brought back all kinds of plants and animals from the New World.
Columbian Exchange