Decaying tree would be considered a biotic as it is now dead, however it will form an ecosystem of bacteria, fungi and other saprotrophs.
All things are considered to abiotic except Bacteria. These are microscopic living beings. That carry out all of the main processes, and some unique ones to live.
The parallel evolution of flowering plants and pollinators represents a case of coevolution. It may lead to different types of natural selection.
<h3>Disruptive, stabilizing, and directional selection</h3>
Disruptive selection is a type of natural selection that favors extreme phenotypes (in this case, flowers too small or too big).
Stabilizing selection is a type of selection that leads to decreased genetic variation (in this case, all red flowers to attract pollinators)
Finally, directional selection is a type of natural selection where an extreme phenotype can be favored (in this case, taller plants to be noted by bees).
Learn more about natural selection here:
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Wind passes energy to the water causing waves.After waves break on shore,the water runs down the beach back into the ocean.Waves transport energy ,not water.As a wave crest passes ,the water particles move in circular paths..
