biogeography

Question 1

Jordan’s Law

Answer 1

-given any species, in any region, the nearest related species is found in a separate but neighbouring region that barriers the two species

Question 2

on islands, speciation has only occured where…

Answer 2

there are multiple island in an archipelago

• speciation on islands only occurs when it is not a solitary island
• ie. hawaiian honeycreepers or darwin’s finches

Question 3

species range is determined by…

Answer 3

abiotic factors (temperature, rain, landscape)
biotic factors (distribution of competitors and resources)
history (dispersal, speciation, impact of humans)

Question 4

suture zones

Answer 4

• places where divergent biota meet

- ie. red-breasted/naped sapsuckers and yellow-bellied sapsuckers

Question 5

hybrid zones

Answer 5

-where breeding zones of sister taxa over lap

Question 6

living things tend to live in…

Answer 6

phenotyic/genetic clusters, rather than smooth continuum; the word species describes such clusters

Question 7

BC’s major suture zone is

Answer 7

along the rocky mountains

Question 8

many groups of species have distinct

Answer 8

western, interior, and eastern forms

Question 9

allopatric speciation=

Answer 9

when groups of a species become separated, becoming significantly different, then are recombined as two different species
-geno/phenotypic variation occurs due to different selective pressures, undergoing different genetic drift, and different mutations occuring in the populations