what is a species

Question 1

typological species concept

Answer 1

a species was considered a distinct and unchangeable identity

Question 2

what are the issues with typological species concept

Answer 2

-does not account for natural variation
-degree of difference requires a judgment call
-species change over time

Question 3

typological species concept: small difference from the type specimen are considered ___ imperfections, therefore ___ was viewed as an imperfect manifestation

Answer 3

-accidental
-varation

Question 4

a species is a reproductive community of populations (reproductively isolated) that occupies a specific niche in nature

Answer 4

biological species concept

Question 5

what is the central idea revolving biological species concept

Answer 5

ability to interbreed and reproductive properties

Question 6

biological species concept is not based on ___

Answer 6

morphological charecteristics

Question 7

members of a reproductive community have common ecological propoerties

Answer 7

niche

Question 8

what issues do biological species concept have

Answer 8

-what degree of reproductive isolation is necessary
-does not accommodate asexual organisms
-has no time dimension; no status with fossils
-breeding experiments can be difficult to conduct

Question 9

what is the modern version of biological species concept

Answer 9

a species is an interbreeding population of individuals having common descent and sharing integrading characteristics

Question 10

an evolutionary species is a single cohesive lineage of ancestor-descendant populations that maintains its identity from other such lineages and has its own evolutionary tendencies and historical fate

Answer 10

evolutionary/cohesion species conept

Question 11

the most inclusive population of individuals having the potential for phenotypic cohesion through intrinsic cohesion mechanisms

Answer 11

cohesion concept

Question 12

an evolutionary species is a single cohesive lineage of ancestor-descendant populations that maintains its identity from other such lineages and has its own evolutionary tendencies and historical fate

Answer 12

evolutionary/cohesion species concept

Question 13

-accommodates sexual and asexual organisms
-adds time dimension; supports fossils
-still requires reproductive isolation in sexual forms

Answer 13

evolutionary/cohesion species concept

Question 14

what is the criteria for identifying species?

Answer 14

-common descent
-small distinct groupings
-reproductive community