Primary producers make their own food for example plants. As you go into the upper levels of the food chain the energy gets distributed to each level, but they lose some of their energy. Without primary producers alligators will not be able to obtain the energy they need for themselves to survive.
Answer:
Primary Succession
Explanation:
Because no organisms previously lived on it. Parking lots can be considered
like rocks, which also undergo primary succession. Overtime soil
will be blown onto the parking lot and if not maintained plants
will begin to grow thus starting new life.
Answer:
This assertion is false since it depends on the type of selection exerted on the trait under investigation
Explanation:
Geographic isolation is caused by physical barriers such as, for example, rivers, mountains, longer distances, etc, which prevent the interchange of genetic material among populations of the same species. Over time, complete geographic isolation leads to genetic isolation among populations and the development of reproductive barriers, resulting in the separation in two species (speciation). Intermediate populations prevent speciation by enabling gene flow among populations. In consequence, intermediate populations often exhibit intermediate traits as a consequence of bidirectional gene flow; however, there are cases where a given trait is favored by non-directional selection, thereby favoring phenotypic values exhibited by marginal populations localized at the extreme distributional range of the species.
