Species Concept

Bacteriologists can use colony structure (e.g., shape, color, texture) to define different species of bacteria. Why is this a useful tool for identification of bacterial species? A. bacteria are too small to view individually B. bacteria reproduce asexually C. bacteria replicate every 20 minutes D. bacteria often hybridize E. bacteria often live in locations that are inaccesible to humans

B. bacteria reproduce asexually

Which of the various species concepts distinguishes two species based on the degree of genetic exchange between their gene pools? A. morphological B. biological C. genetic D. ecological

B. biological

A biologist discovers two populations of wolf spiders whose members appear identical. Members of one population are found in the leaf litter deep within the woods. Members of the other population are found in the grass at the edge of the woods. The biologist decides to designate the members of the two populations as two separate species. Which species concept is this biologist most closely utilizing? A. phylogenetic B. ecological C. biological D. morphological E. more than one of the above

B. ecological

You are confronted with a box of preserved grasshoppers of various species that are new to science and have not been described. Your assignment is to separate them into species. There is no accompanying information as to where or when they were collected. Which species concept will you have to use? A. morphological B. ecological C. biological D. genetic

C. Biological

Bacteriologists can use colony structure (e.g., shape, color, texture) to define different species of bacteria. This is an example of identification using the ___ species concept. A. ecological B. biological C. morphological D. phylogenetic

C. Morphological

According to the phylogenetic species concept, what is a species? A. a clone of genetically identical organisms B. a population that interbreeds and produces fertile offspring C. a set of organisms with a unique genetic history D. a population that is physically able to mate even if there are no offspring or the offspring are infertile E. a population with a distinct fossil record

C. a set of organisms with a unique genetic

There is still some controversy among biologists about whether Neanderthals should be placed within the same species as modern humans or into a separate species of their own. Most DNA sequence data analyzed so far indicate that there was probably little or no gene flow between Neanderthals and Homo sapiens. Which species concept describing species relationship between modern humans and Neanderthals is most applicable in these observations? A. ecological B. morphological C. genetic D. biological

D. Biological

Which of the various species concepts distinguishes two species based on the degree of genetic exchange between their gene pools? A. morphological B. biological C. ecological D. phylogenetic

D. Phylogenetic

Bird guides once listed the myrtle warbler and Audubon's warbler as distinct species. Recently, these birds have been classified as eastern and western forms of a single species, the yellow-rumped warbler. Which of the following pieces of evidence, if true, would be cause for this reclassification? A.The two forms live in similar habitats. B. The two forms are very similar in coloration. C. The two forms have similar food requirements. D. The two forms interbreed often in nature, and their offspring have good survival and reproduction. E. The two forms have many genes in common.

D. The two forms interbreed often in nature, and their offspring have good survival and reproduction.

What does the biological species concept use as the primary criterion for determining species boundaries?

Gene flow