Biology I- chapter 24

Macroevolution is the study of evolutionary changes that produce __.

New species and groups of species.

A species is a group of related organisms that share a distinctive set of __ in nature.

Attributes.

The process of generating a new species is called __.

Speciation.

According to Ernst Mayr, the __ species concept defines a species as a group of individuals whose members have the potential to interbreed in nature.

Biological.

Reproductive isolation prevents one species from successfully __ with another species.

Interbreeding.

The two categories of reproductive isolating mechanisms are and .

Prezygotic; postzygotic.

Allopatric speciation occurs when gene flow is or when a population becomes isolated.

Interrupted; reduced.

In sympatric speciation, speciation occurs in __ overlapping populations.

Geographically.

Morphological traits are the __ characteristics of a population's members.

Physical.

Molecular features used to distinguish species include DNA _ sequences and chromosome structure.

Nucleotide.

Ecological factors can be used to distinguish one species from another based on their __ needs.

Habitat.

A drawback for determining species is that members of the same species can look very __ or very different.

Similar.

The existence of biological factors that prevent one species from successfully interbreeding is called __.

Reproductive isolation.

Prezygotic isolating mechanisms include habitat isolation, temporal isolation, behavioral isolation, __ isolation, and gametic isolation.

Mechanical.

Postzygotic isolating mechanisms include hybrid inviability, hybrid sterility, and hybrid __.

Breakdown.

The evolutionary lineage concept states that members of a species share an __ process and history.

Evolutionary.

The general lineage concept suggests all modern species concepts are variants of a single __ concept.

General.

The term 'species' is derived from Latin meaning or .

Kind; appearance.

Geographic isolation can lead to the __ effect in new populations.

Founder.