en CR Speciation and Species Selection 24 speciation: formation of new species Morphospecies: species are clearly distinct, demarcated by current natural discontinuities between them. Paleospecies: Viewed historically, through time, discovered fossil intermediates that fill in the missing gaps allopatric: 2 groups of species are isolated geographically, and diverge into separate species. peripatric: An isolated group is severed from the original population parapatric: The population is continuous, but the population does not mate randomly. sympatric: Exploring a new niche may automatically reduce gene flow with individuals exploiting the other niche. Ecological: lions and tigers occupy different habitats Temporal : Differences in the timing of mating prevent different species from interbreeding. Behavioral : barrier occured during courtship Mechanical : Anatomical differences between species make mating physically impossible. Gametic : isolation arises when the gametes of different species cannot fuse. hybrid: offspring of parents from two genetically distinct populations Inviability: zygote fails to develop into an adult hybrid. Sterility: Hybrids live to adulthood but cannot produce viable gametes. Species selection: process responsible for the proliferation of species that have lower extinction and higher speciation rates. Microevolution: small scale evolutionary change caused by changes in allele Macroevolution: large scale evolutionary events over long time spans w/c results in phenotypic changes. panmictic : genes are always intermixed, ever subjected to recombination and creation of new gene interactions Species drift: morphological trends are generated because of speciation and extinction processes that are random with respect to within-population processes hitch hiking: process where a given trait is proliferated in a clade, owing to its accidental association with a rapidly speciation group having relatively low extinction rates wrights rule: shifting balance theory coevolution: process of reciprocal evolutionary change in interacting species Mullerian : describes the convergence of unpalatable models to a similar phenotype Batesian : nontoxic species mimics toxic species

Speciation and Species Selection

													1
								2						3	4
							5

					6

	7					8


		9
								10
11	12		13
							14
																15
						16

								17			18


			19
										20
				21


												22

									23

Across:

5.	isolation arises when the gametes of different species cannot fuse.
6.	describes the convergence of unpalatable models to a similar phenotype
7.	species are clearly distinct, demarcated by current natural discontinuities between them.
9.	Hybrids live to adulthood but cannot produce viable gametes.
10.	process responsible for the proliferation of species that have lower extinction and higher speciation rates.
11.	Anatomical differences between species make mating physically impossible.
14.	barrier occured during courtship
16.	zygote fails to develop into an adult hybrid.
17.	formation of new species
19.	process where a given trait is proliferated in a clade, owing to its accidental association with a rapidly speciation group having relatively low extinction rates
20.	process of reciprocal evolutionary change in interacting species
21.	genes are always intermixed, ever subjected to recombination and creation of new gene interactions
22.	Exploring a new niche may automatically reduce gene flow with individuals exploiting the other niche.
23.	small scale evolutionary change caused by changes in allele

Down:

1.	shifting balance theory
2.	nontoxic species mimics toxic species
3.	The population is continuous, but the population does not mate randomly.
4.	Viewed historically, through time, discovered fossil intermediates that fill in the missing gaps
8.	An isolated group is severed from the original population
10.	morphological trends are generated because of speciation and extinction processes that are random with respect to within-population processes
12.	lions and tigers occupy different habitats
13.	offspring of parents from two genetically distinct populations
15.	large scale evolutionary events over long time spans w/c results in phenotypic changes.
18.	Differences in the timing of mating prevent different species from interbreeding.

Speciation and Species Selection

Across:

5.	isolation arises when the gametes of different species cannot fuse.
6.	describes the convergence of unpalatable models to a similar phenotype
7.	species are clearly distinct, demarcated by current natural discontinuities between them.
9.	Hybrids live to adulthood but cannot produce viable gametes.
10.	process responsible for the proliferation of species that have lower extinction and higher speciation rates.
11.	Anatomical differences between species make mating physically impossible.
14.	barrier occured during courtship
16.	zygote fails to develop into an adult hybrid.
17.	formation of new species
19.	process where a given trait is proliferated in a clade, owing to its accidental association with a rapidly speciation group having relatively low extinction rates
20.	process of reciprocal evolutionary change in interacting species
21.	genes are always intermixed, ever subjected to recombination and creation of new gene interactions
22.	Exploring a new niche may automatically reduce gene flow with individuals exploiting the other niche.
23.	small scale evolutionary change caused by changes in allele

Down:

1.	shifting balance theory
2.	nontoxic species mimics toxic species
3.	The population is continuous, but the population does not mate randomly.
4.	Viewed historically, through time, discovered fossil intermediates that fill in the missing gaps
8.	An isolated group is severed from the original population
10.	morphological trends are generated because of speciation and extinction processes that are random with respect to within-population processes
12.	lions and tigers occupy different habitats
13.	offspring of parents from two genetically distinct populations
15.	large scale evolutionary events over long time spans w/c results in phenotypic changes.
18.	Differences in the timing of mating prevent different species from interbreeding.