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<span>Hypotheses are typically written in an "if-then" format. This statement concerning algal increases could be properly written as "if the red algal concentration is higher than usual, then there will be dead fish floating on the surface of the water." These statements allow us to test the belief and see if there are causal links between the two.</span>
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.
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An important function of seed dormancy is delayed germination, which allows dispersal and prevents simultaneous germination of all seeds. ... Many species of plants have seeds that delay germination for many months or years, and some seeds can remain in the soil seed bank for more than 50 years before germination.