L17-Species and Speciation-2-27-L17

Why are Sturnella neglecta and S.

magna classified as two different

species even though they are

practically identical in

appearance?

because they have different mating songs

In biology, organisms are said to

belong to the same species if:

Biological concept: ability to interbreed and produce fertile offspring

A problem with using the biological

concept to define species is:

1. interbreeding doesnt work for all organisms

2. Species are known to hybridize (mating b/w 2 species of organisms)

A mechanism that prevents

species from interbreeding is:

1. Behavioral Isolation

2. Mating Time Diff.

3. Habitat Isolation

4. Mech. Incompatability

5. Gametic Incompatibility

6. Hybrid Weakness

The species concept in which species

are part of an ancestral lineage that

are distinct from other species along

the same lineage is:

Evolutionary Species Concept

When an ancestral species evolves to

give rise to a multitude of species,

this is called:

Speciation

When a population becomes

separated from the parent population

to become a new species, this is:

Allopatric Speciation

Sympatric speciation is:

Species forming at the same place and time