Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Biology 112
Exam #1
| Question | Answer |
|---|---|
| The study of the distribution of species and ecosystems in geographic space and through geological time. | Biogeography |
| Following colonization of several North American lakes, populations of lake whitefish diverged from large benthic morphs, which were the original colonists, to smaller limnetic morphs. These divergences provide an excellent example of ... | Parallel evolution |
| The potential for competition increases with... | Increasing phenotypic similarity |
| Adaptive evolution results from... | Natural selection |
| The tendency of distantly related organisms to evolve superficially similar characteristics under similar environmental conditions is called... | Convergence |
| Professor Baldauf published her phylogenetic tree in 2003. Her work dramatically changed the way we think about evolutionary relationships among... | Eukaryotes |
| Two species that use a limiting resource in the same way cannot coexist indefinitely, is what principle? | Competitive exclusion principle |
| Which of the following traits cannot continue to evolve via natural selection? | An allele carried by all members of a population involving oxidative metabolism regulation (assuming no further mutations arise) |
| Natural selection results in... | Adaptive change in allele frequencies within a population |
| The movement of a gene (gene flow) from one species into the gene pool of another by the repeated backcrossing of an interspecific hybrid with one of its parent species | Introgression |
| Darwin hypothesized that the finches of the Galapagos Islands diverged from a common ancestor to fill open ecological niches (depicted in figure below) in a process that we now call... | Adaptive radiation |
| an ... is one of two or more variants of a gene | Allele |
| analogous traits are... | evolve independently in unrelated species facing similar environmental conditions |
| Which mode of selection decreases genetic diversity within a population? | Stabilizing selection |
| The greater the similarity between two groups of organisms, the closer is their relationship and the closer in geologic time is their common ancestral group, which theory? | Descent with modification |
| _ are shared by two or more different species that share a common ancestor | Homologous traits |
| A young wolf suffers from numerous deformities that resulted from.... | Very low levels of heterozygosity within the gene pool of her pack |
| In order for natural selection to act on a mutation that arises in a population, that mutation must be present in the DNA of ___ cells | Germ-line |
| Which of the following traits cannot continue to evolve via natural selection? | A lethal sperm cell mutation |
| Natural selection acts on... | Individuals, and a result, adaptive evolutionary change occurs in populations |
| evolutionary theory predicts that interspecific competition... | Potentially limits the fitness of all participants, and thus adaptations that minimize competition are considered to be adaptive |
| ___ causes the accumulation of new variations and the loss of unfavorable variations | Natural selection |
| The axiom that all life evolved from one or a few simple kind of organisms is a postulate of the theory of... | Descent with Modification |
| Currently, the most widely accepted higher classification system, divides all living organisms into... | 3 domains |
| The term for a branching diagram depicting a pattern of evolutionary divergence in a lineage of organisms.... | Phylogenetic tree |
| The environments of most organisms have been in constant change throughout geologic time, is which theory? | Natural selection |
| The first published manuscript on natural selection, "On the tendency of species to form varieties; and on the perpetuation of varieties and species by natural means of selection," was co-authored in 1858 by Charles Darwin and who? | Alfred Russel Wallace |
| Darwin's principle of _____ states that phenotypic traits that tend to reduce competition are adaptive, and thus should increase in frequency in resource-limited ecological settings | Divergence |
| A population of organisms has the tendency and the potential to increase at a geometric rate, which theory? | Natural selection |
| The term ___ refers to the composite of an organism's observable characteristics or traits, such as its morphology, development, biochemical or physiological properties, behavior, and products of behavior | Phenotype |
| The hierarchical system of classifying and naming organisms which is in use today was originally developed by... | Linnaeus |
| Ribosomal RNA sequences differ among lineages due to _____. These events produce variation in rRNA sequences that we can use to trace evolutionary relationships | Neutral or adaptive mutations |
| Which of the following traits can continue to evolve via natural selection? | An enzyme variant that improves digestive efficiency for a subset of a population that inherited the variant |
| The abiotic and biotic conditions that a species needs to grow, survive, and reproduce | Ecological niche |
| Groups of actually or potentially interbreeding natural populations which are reproductively isolated from other such groups | Mayr's biological species concept |
| To an evolutionary biologist, _____ simply means reproductive success and reflects how well an organism is adapted to its environment | Fitness |
Created by:
aturner104
Popular Biology sets