I hope it is 30,000 GENES are now estimated
Answer:
Explanation:
The cells in our bodies need oxygen to stay alive. Carbon dioxide is made in our bodies as cells do their jobs. The lungs and respiratory system allow oxygen in the air to be taken into the body, while also letting the body get rid of carbon dioxide in the air breathed out.
Maybe fruits and vegetables?? Those are important.
B) Geologic.
Hope this helps~!
~{Isle of flightless birds}
