<span>During inspiration, after leaving the larynx, air enters the trachea.</span>
Answer: changed by molecular oxygen
Explanation:
Biologically induced molecular oxygen (dioxygen, O2) started to accumulate in Earth's atmosphere and changed Earth's atmosphere from a weakly reducing atmosphere to an oxidizing atmosphere.
Answer:
Option A
Explanation:
Please see the attachment
Terrestrial ecosystems (tetrapods)