On the slopes of the Washington Cascades, ecologists have studied some closely related vole species for decades. Many of these vole species, when they occur on separate mountains, tend to choose very similar seed sizes for food. However, when these species occur together on the same mountain slope, their food choices tend to differ, with some species selecting small seeds and others feeding exclusively on larger seeds. This behavior may be an example of:.
a. intraspecific competition.
b. resource partitioning.
c. habitat fragmentation.
d. niche fragmentation.
e. intraspecific range diversion.

Charles darwin published his theory of evolution in 1859. in what way foes modern evolutionary theory differ from the theory as proposed by darwin? a) darwin inferred that individuals can evolve, but modern generic science has shown that this is not true. b)darwin inferred that individuals do not evolve, but modern genetic science has shown that this is not true. c)modern science has disproved most of darwin's original theory of evolution, because darwin knew nothing about generations and their role in heredity. d)generic studies have shown that gene expression and other factors operate along with natural selection, but most of darwin's theory has been supported by modern science.

When a human or animal consumes food, the carbon in that food is most likely to be converted into which of the following elements? a. carbon remains carbon b. nitrogen c. oxygen d. hydrogen

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes