B
digestive system absorbs water and nutrients and circulatory systems carries nutrients to cells and excretory system helps eliminate waste
The following are the four main gorups
1-Protozoans with Pseudopods
2-Ciliates
3-Flagellates
4-<span>Parasitic Protozoans</span>
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:
brainly.com/question/23929271
Answer:
There are 4 trophic levels in the following food chain.
