At first, the population of predators would spike and increase quickly, but then over time, gradually decrease.
(This is because at first there's more food, so the predators population increases. But overtime it begins to level out and the predators' population catches up with the prey, and in result, doesn't continue increasing.)
Perch have paired pectoral and pelvic fins, and two dorsal fins, the first one spiny and the second soft. These two fins can be separate or joined.
The mold and the cast are related in that the mold is the object that makes the shape of the cast. Additionally they both hold the shape or part of an organism
When organisms are buried in sediment they may decay or dissolve away leaving a cavity or what we call mold, if the pace is filled with sediment, then an external cast is made. A mold fossil becomes a cast fossil when it is filled with sand or mud and hardens. A mold fossil can turn into a cast fossil, but a cast fossil cannot be a mold.
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These help the doctor because where there is inflammation there is heat and where ever there is inflammation, that is the part of the body that has the issue so symptoms should arise from that area.