Answer:
Why does life have to be TOUGH though.
That is why people want to sui/cide parents can cause that to.
Dr. Blackwell caused rats to stop breathing when he lesioned their MEDULLA.
When doctor Blackwell induced a lesion in the rats' medulla, he discovered that the rats stopped breathing. He explained this observation by saying that the medulla has functional role to play in the breathing process of rats.
1.Fossils
2.Location
Scientist use fossils to study body structures and compare them.
Scientist use location to study location to see how organisms used their features to cross water or survive in different temperatures.
Answer:
<em>Nitrogen</em><em> </em><em>dioxide</em><em> </em><em>is </em><em>an </em><em>irritant </em><em>gas,</em><em> </em><em>which </em><em>at </em><em>high </em><em>concentration</em><em> </em><em>cause </em><em>inflammation </em><em>of </em><em>the </em><em>airways.</em><em> </em><em>.</em><em>.</em><em>.</em><em> </em><em>Nox </em><em>gases </em><em>react</em><em> </em><em>to </em><em>form </em><em>smog </em><em>and </em><em>acid </em><em>rain </em><em>as </em><em>well </em><em>as </em><em>being </em><em>central </em><em>to </em><em>the </em><em>formation</em><em> </em><em>of </em><em>fine </em><em>particles </em><em>and </em><em>ground</em><em> </em><em>level </em><em>ozone,</em><em> </em><em>both </em><em>of </em><em>which</em><em> </em><em>are</em><em> </em><em>associated</em><em> </em><em>with </em><em>adverse </em><em>health</em><em> </em><em>effects.</em>
<span>Cenozoic
</span><span>Mesozoic
</span><span>Paleozoic
</span><span>Precambrian </span>
