The different layers of the earth have different densities, and the seismic waves produced during an earthquake travel at different speeds through these layers. By measuring the different speeds, we can clarify the presence of layers within the earth, as well as their densities. Waves will travel faster through thinner layers, and slower through more dense layers.
Some plants have thorns to prevent animals from eating them, others are poisonous, so no one goes near them, others cause rashes, so no one touches them...etc.
Different plants have different defense mechanisms.
So the answer to your question is NO.
Hope this helps!
<span>Carbon-based macromolecules are found in all life forms.</span>
Is this an actual question