Topic 6- Speciation Flashcards

1
Q

Speciation

A

Is the process by which, one species splits into two or more species

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2
Q

Biological species concept

A

Biological species are groups that actually or potentially interbreed and produce fertile offspring in nature, and which do not form fertile offspring with members of other groups.

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3
Q

Reproductive isolation

A

Is the opposite of compatibility; it is the result of reproductive barriers- defined as biological features of organisms that reduce or prevent gene exchange with members of other groups

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4
Q

Species Concepts- Morphological

A

defines species based on morphological similarity

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5
Q

Species concepts- Ecological

A

defines species based on their ecological niche (the physcial and enviromental conditions it requires and the interactions it has with other species

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6
Q

Reproductive barrier- Prezygotic

A

-Before fertilization/before mating
-block fertilization by reducing the likelihood of mating, by preventing an attempted mating from being success, or by impeding fertilization after a successful mating

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7
Q

Reproductive barrier- Postzygotic

A

-After fertilization/after mating
-Reduce the survival/or and reproductive success of hybrids–> Reduce the fitness of hybrids

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8
Q

Geography of populations - Allopatric

A

Occurring in separate, non-overlapping geographic areas

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9
Q

Geography of populations- Sympatric

A

Occurring in the same, overlapping geographic area

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10
Q

Mechanisms of speciation

A

Ecological, polyploidization, reinforcement

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