A scientific species name:
consists of both the genus and species names.
Whose work is credited with providing the foundation for the development of systematics?
If formerly interbreeding organisms are prevented from the production of fertile offspring, ______ has occurred.
The evolution of strong prezygotic barriers in regions of secondary contact between populations due to selection against less fit hybrids is:
The "Cambrian Explosion" refers to:
the sudden appearance and diversification of several phyla of multicellular organisms in the fossil record approximately 530 million years ago.
The evolution of Darwin’s finches on the Galapagos islands is an example of:
The Biological Species Concept:
defines a species as any group of actually or potentially interbreeding species that produce viable offspring.
Courtship displays are involved in what type of reproductive isolating mechanism?
A population of organisms that breaks away, becomes different from original population through isolation/separate evolution might become a separate:
Which of the following is NOT likely to increase speciation rates in a taxa?
Horses and donkeys can breed and produce offspring (mules). Yet horses and donkeys remain separate species. This is because of the ______ of the mules.
Horses and donkeys can breed and produce sterile offspring (mules). Horses and donkeys remain separate species because of this hybrid sterility:
a postzygotic barrier to reproduction.
What is NOT a difficulty with the biological species concept?
Which of the following lists the selected taxonomic categories in proper hierarchical order (from most inclusive to least inclusive)?
Phylum; Class; Family; Genus
Some closely related species of plant avoid formation of hybrids by flowering at different seasons. This type of reproductive isolating mechanism is:
“When speciation occurs, two new daughter species are produced from one parent species, which goes extinct.” This statement is:
incorrect; new species may arise without the extinction of the parent species.
The “father of taxonomy,” __________, believed that the __________ was the special taxonomic ranking; today we emphasize __________.
Linnaeus; genus; species
What is NOT an example of a pre-zygotic isolating mechanism?
Which species concept is based on the degree of reproductive isolation between populations of species?
Biological Species Concept
What is NOT an example of a post-zygotic isolating mechanism?
reproductive organ incompatibility
The Morphological Species Concept:
groups species based on similar phenotype.
All of the following factors are believed to affect speciation rates, EXCEPT:
individual growth rate
What is expected to occur under reinforcement?
Prezygotic isolation becomes stronger between sympatric than between allopatric populations that have diverged for the same amount of time.
What is an example of allopatric speciation?
A river divides a population of squirrels and over time these squirrels develop unique mating habits. When the river dries up, these squirrel populations no longer identify each other as potential mates.
The taxonomic rank that includes species but not families is:
The taxonomic rank that includes orders but not phyla is:
The taxonomic rank that includes families but not classes is:
In what way does generation time affect speciation?
The longer the generation time, the slower the process of speciation.
In animals, it is believed that the most common mode of speciation is:
Homo sapiens is the name of a species. Homo is a genus. Hominidae is a family. Primate is the name of an order. Mammal is the name of a:
Speciation without geographic isolation is called:
Which of the following taxonomic ranks is least inclusive?
Phylogenetic trees should be viewed as:
hypotheses regarding evolutionary relationships of taxa.