<u>Answer:</u>
<em>Hydrogen and ozone are both examples of trace gases.
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<u>Explanation:</u>
Trace gases are present in minor quantities in the <em>earth’s atmosphere and all the gases except nitrogen, oxygen and argon </em>which make up the major portion of earth’s atmosphere are considered trace gases.
The respective percentages of nitrogen, oxygen and argon in the atmosphere are<em> 78.1%, 20.9% and 0.934%.</em> The process that produce trace gases is called source and the process that removes trace gas from the <em>atmosphere is called sink.
</em>
<em>Some other examples of trace gases are carbon dioxide, neon, helium etc.
</em>
Answer:
Roots transporting water
Explanation:
Xylem are a special kind of tissue in plants. They help transport water and nutrients/minerals from the roots of the plant to the stem and the leaves. Also, the xylem help form the stem and give support to the plant.
Therefore, if the xylem is damaged, the process that is first affected is the roots transporting water.
Abnormally the slow depolarization of the ventricles would most likely change the shape of the QRS in an ECG tracing. It is a combination of three graphical deflections which is seen on a typical electrocardiogram. It is the most visually obvious and central part of the tracing. It corresponds to depolarization of left and right ventricles of the human heart.
During the activity, it may be shorter in children.
QRS waves occur in succession rapidly. Q wave is a downward deflection following P wave. R wave follows upward deflection and S wave is downward deflection which is after R wave while T wave follows S waves.
<span>The way goods and services are produced, distributed, and consumed in a society mean a consumpation of goods and the supply of a money, that talks about economy, so the answer is C: economy.</span>
