module 8 Flashcards
speciation forms what
a conceptual bridge between microevolution and macroevolution
what is an example of macroevolutionary change
origin of new groups of organisms such as mammals or flowering plants through a series of speciation events
species in terms of macroorganism
group of organisms that produce valuable fertile offspring under natural conditions
reproductive isolation
barriers prevent members of two species from producing viable fertile offspring
what could be a reason for reproductive isolation
could. be mating timeline differs or traits differing
what could happen to a hybrid that is born
can be less happy and not being able to reproduce
hybrid breakdown
anything inhibiting thriving after being born
species in terms of microorganism
genetically related enough (defined threshold) and fulfill same ecological roles
how do microbes reproduce
asexually
can speciation take place with or without geographic seperation
yes
allopatric speciation
Areas with divided barriers have more species (island chains)
-population forms new species while geographically isolated from the parent population
sympatric speciation
-less common and driven by sexual selection or utilization of a different food or habitat
no subset of species forms without geographic isolation
what could allopatric speciation be caused by
founder effect or river diverging
allo =
other
sym=
together