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The overall distribution, or area, occupied by a species. The relationship between the body size of a species and the amount of territory or home range it requires. The number of different species found, on average, in a habitat of a given size. The number of species found, on average, in tropical versus northern areas.
The edges of the forest are exposed to more sunlight, which increases temperatures and decreases humidity. Weedy species from the deforested areas invade the edge. Trees on the edge of the fragments are frequently blown down. All of the above are true.
Islands often lack predators and large herbivores, but settlers introduce rats, cats, dogs, pigs, goats, and other exotic species. They are relatively easy to hunt to extinction, because their total population size is often small. They are relatively easy to hunt to extinction because their distribution is limited. All of the above are true.
They are never found. They are identified by obvious abnormalities, such as albinism. They are more likely to go extinct. They are more likely to be found in large expanses of habitat where butterflies are common.
It consists of the cells containing the rarest species. It identifies the group of cells that includes one of each species in the lineage being analyzed---for example, birds. It consists of the 10 cells with the most species. It indicates where species in other, more poorly studied, lineages--- like mosses or spiders---are also likely to be found.
