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Ecology Test #2
Test questions and terminology
| Question | Answer |
|---|---|
| This Model specifically addresses the situation in which subpopulations in poor-quality habitats are maintained by immigration of individuals from other subpopulations that produce surplus individuals | Source-Sink Model |
| The classic peppered moth example of evolution: | involves differential bird predation as a selective agent |
| If 16% of a population at Hardy-Weinberg equilibrium is composed of homozygous recessive individuals, what percentage of the population should be heterozygotes? | 48% |
| Organisms with a type III survivorship curve typically: | exhibit little or no parental care |
| Annual plants: | may be semelparous or iteroparous |
| An individual which produces both male and female gametes at the same time: | simultaneous hemaphrodite |
| A mating system in which one male forms a pair bond with many females at the same time or in quick succession: | polygyny |
| The number of individuals of a population that can survive with the amount of resources the environment can supply: | carrying capacity |
| Any change in gene frequency through time, producing cumulative changes in the characteristics of a population: | evolution |
| Identify the concept/pattern illustrated in the figure below: . . . . | Exponential Growth |
| Suppose you observe some birds during mating season and notice that polygyny is occurring, although there are unmated males in the population. You might hypothesize that: | Males with more than one mate have better territories than unmated males |
| Skewed sex ratios are most likely to occur in species which have: | Frequent matings among siblings |
| The geographic distribution (geographic range) of a species is most often determined by: | Climate and Barriers |
| Experiments of clutch size manipulations have shown that enlarged broods: | -Increase the foraging time and energy expenditure of the parent birds -Result in a lower % of surviving chicks -Decrease the survival of the parent birds to the next breeding season |
| If 49% of a population at Hardy-Weinberg equilibrium is composed of homozygous dominant individuals, what percentage of the population should be heterozygous? | 42% |
| In the equation , what term accounts for the effects of density: | . |
| When discussing the arrangements and movements of organisms in a population, it would be correct (according to strict ecological definitions) to say that: | -the Atlantic Ocean serves as an important barrier for the dispersal of many plants found on the E. coast of US -Populations with aggregated dispersion patterns generally require larger sample areas -Dispersal can affect Dispersion |
| r-selected species typically: | -Produce a large number of offspring -Show a type III survivorship curve -Allocate a large amount of energy to reproduction -Are short-lived |
| These circumstances would act in a density-dependent way: | -Incidence of disease -Competition for water |
| The condition of reproducing repeatedly during the lifetime: | Iteroparity |
| A population that is divided into discrete subpopulations: | Metapopulation |
| The physical expression of an organism's genotype, including modification by the environment; the outward appearance and behavior of an organism | Phenotype |
| Random change in allele frequency over time due to a chance occurrence alone without any influence by natural selection: | Genetic Drift |
| Reversible changes in morphology and/or physiology in response to a new range of environmental conditions: | Acclimation/Acclimatization |
| Category of social behavior that has a positive effect on the fitness of both the donor and the recipient: | Cooperation |
| An individual which changes its sex during its lifetime, first producing one type of gamete and then later producing the other type of gamete: | Sequential Hermaphrodite |
| Differential survival or reproduction that results from variation in genetically based social behavior among closely related individuals | Kin selection Also, evolution of a genetic trait expressed by one individual that affects the fitness of directly related individuals |
| A genetically differentiated subpopulation that is restricted to a specific habitat: | Ecotype |
| A change in the genetic material of an organism: | Mutation |
Created by:
rstacey1
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