For which of these groups is the biological species concept not useful for determining species? Mark all that apply. O Separate recognized species that form hybrids (many plant species) Nonsexual groups Extinct groups (fossils) O Species with many remote, isolated populations (vernal pools) O Two sympatric species that do not form hybrids O An introduced species that forms a hydrid with a native species

Which of the following speciation mechanisms is most likely to be responsible for the divergence of a single species into two distinct species due to geographic isolation caused by a mountain range? Sympatric speciation Allopatric speciation (dispersal) Allopatric speciation (vicariance) Parapatric speciation

What is a reason that speciation can occur?         Organisms within a species are brought into closer proximity by a physical barrier.         Organisms within an ecosystem make adaptions that involve different breeding times or interactions.          Organisms develop traits that are not beneficial to their survival, and these traits are passed from generation to generation.         Organisms develop traits that are beneficial and pass on the same traits to all future generations within the same species.

In the late 1900s, two populations of bubble guppies became isolated from each other when a tsunami altered the path of a lake creating a barrier. Now, hundreds of years later, the populations can no longer successfully breed with each other even if they are both moved to a new pond. These organisms have undergone: O temporal isolation. sympatric speciation. O allopatric speciation. equilibrium population. adaptive radiation.

Which of the phylogenetic trees below represent the same evolutionary relationships? Tree 1 Tree 2 Tree 3 D В D G ·E O Tree 1 and Tree 3 O Tree 1 and Tree 2 O Tree 2 and Tree 3 All three represent the same relationships O No two trees represent the same relationships

The phyletic gradualism model of speciation asserts that; Most speciation occurs allopatrically Speciation is a slow and gradual process that occurs as species slowly become geographically separated speciation occurs in quickly and then is followed by periods with little if any change Most speciation occurs sympatrially

why is it more difficult to assign species designations for paleo species than it is for extant species?

An abiotic environmental filter that results in the presence of only 3 tree species that can tolerate reduced water supply in a biological community, from a pool of 20 possible tree species, is likely to result in O random phylogenetic structure O phylogenetic clustering O phylogenetic overdispersion O resource generalization

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Which form of speciation is more common? O Allopatric speciation O Sympatric speciation