Bio Ch 14.1 - 14.3 Quiz

Speciation, or the formation of new species, is

• responsible for the diversity of life.

• necessary for natural selection and adaptation.

• an event that has occurred only a few times in the history of the planet.

• a form of microevolution.

Microevolution

• is the extinction of species

• the formation of new species

• a change in the gene pool of a population from one generation to the next

• dramatic biological changes, such as the origin of flight, within a taxon

What is a species?

• are physically similar.

• live together in a location and carry out identical ecological roles.

• share a recent common ancestor.

• have the potential to interbreed in nature and produce fertile offspring.

Describe the similarities and differences between biological species concept, ecological species concept, and phylogenetic species concept.

The biological species concept is only so useful in that it is limited in sexual reproduction and not useful in asexual reproduction.

• True

• False

The phylogenetic species concept defines a species as a set of organisms that shares a common ancestor and forms one branch on the tree of life.

• True

• False

The ecological species concept identifies species in terms of their ecological niches.

• True

• False

The morphological species concept relies upon comparing the DNA sequences of organisms.

• True

• False

Under the biological species concept, the gap between species is maintained by reproductive isolation.

• True

• False

What is the determining factor for species to be the same in regards to the biological species concept?

• use different types of behaviors or physical features to attract mates.

• have anatomical features that make it difficult for organisms from the two populations to mate with one another.

• encounter each other, mate, and produce viable, fertile offspring under natural conditions.

• cannot mate with each other because mating occurs at different times.