Topic 6- Speciation

Question 1

Speciation

Answer 1

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

Question 2

Biological species concept

Answer 2

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.

Question 3

Reproductive isolation

Answer 3

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

Question 4

Species Concepts- Morphological

Answer 4

defines species based on morphological similarity

Question 5

Species concepts- Ecological

Answer 5

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

Question 6

Reproductive barrier- Prezygotic

Answer 6

-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

Question 7

Reproductive barrier- Postzygotic

Answer 7

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

Question 8

Geography of populations - Allopatric

Answer 8

Occurring in separate, non-overlapping geographic areas

Question 9

Geography of populations- Sympatric

Answer 9

Occurring in the same, overlapping geographic area

Question 10

Mechanisms of speciation

Answer 10

Ecological, polyploidization, reinforcement