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Chp. 12 BI303
| Question | Answer |
|---|---|
| Known as the evolutionary process that changes anatomy, physiology, or behavior, resulting in an increased ability of a population to live in a particular environment. | Adaptation |
| Adaptations of an organism that influence aspects of its biology is called what? | Life History |
| Life history influences what three things? | number of offspring produced, survival, and the size and age at reproductive maturity |
| What is known as the # of eggs or seeds produced by an organism? | fecundity |
| This is estimated as the degree of similarity in allelic frequencies between populations. | Gene flow |
| Plants have various growth forms that may influence seed # and size. What are four? | Woody plants, graminoids, forb, and climbers |
| List the four seed types from smallest to largest. | Graminoid, forb, woody plants, climbers |
| Name four seed dispersal strategies: | Unassisted, adhesion-adapted, wind-dispersed, and animal-dispersed |
| This is a seed surface structure containing oils attractive to ants. | Eliasome |
| This is a seed surface structure with a fleshy surface to attract birds and other vertebrates. | Aril |
| This is when seed is gathered by mammals and stored in scattered caches. or hoards | Scatterhoarded |
| Known as any relatively discrete event that disrupts ecosystem, community, or population structure and changes resources, substrate availability, or the physical environment. | Disturbance |
| Which seeds are best where disturbance rates are high and plants with good ability to colonize newly opened areas thrive? | Small seeds |
| Which seeds are best where disturbance rates are low and environmental hazards are more important than disturbance? | Large seeds |
| What causes the production of a seedling? | Germination |
| The amount of energy allocated to reproduction is known as? | Reproductive effort |
| What type of selection is favored in disturbed environments? | r selection |
| What type of selection is favored in stable environments? | K selection |
| r selection shows what type of survivorship curve? | Type III survivorship curve |
| K selection shows what type of survivorship curve? | Type I or II survivorship curve |
| What animal represents a r selection? | Deer mouse |
| What animal represents a K selection? | Elephant |
| What are three strategies of plant life histories? | Ruderal, stress – tolerant, and competitive |
| Environmental conditions that limit the growth of all or part of the vegetation. | Stress |
| Which strategy has high disturbance, low stress, low competition? | Ruderal |
| Which strategy has high stress, low disturbance, low competition? | Stress-tolerant |
| Which strategy has high competition, low disturbance, low stress? | Competitive |
| What are four characteristics of ruderals? | Live in highly disturbed environments, good colonizers, grow fast, and mature early |
| What are four characteristics of stress-tolerant plants? | Slow growth, evergreen, inedible to animals, and conserve fixed carbon |
| Opportunistic life history strategy shows what? | Low juvenile survival, Low numbers of offspring, Early reproductive maturity, and good for colonizing habitats that vary unpredictably in time, space. |
| Give an example of an animal who exhibits the opportunistic life history strategy. | Guppy |
| Give an example of an animal who exhibits the equilibrium life history strategy. | Shark |
| Equilibrium life history strategy shows what? | High juvenile survival, Low numbers of offspring, and Late maturity |
| Periodic life history strategy shows what? | Low juvenile survival, High number of offspring, and Late maturity |
| Give an example of an animal who exhibits the periodic life history strategy. | Sturgeon |
| Classification of life histories is based on what three things? | Survivorship, fecundity, and age of maturity |
| These type of birds young are helpless at hatching. | Altrical birds |
| These type of birds young can run, feed on own after hatching. | Precocial birds |
| Give two examples of precocial birds. | Chicken and duck |
| Give two examples of altrical birds. | Robin and eagle |
| Name three threats to the riverside ecosystem. | Channelizing of rivers, Damming to control flooding, and Diverting water for agricultural and urban uses. |
| The study of the relationship between climate and the timing of ecological events is known as what? | Phrenology |
Created by:
gmoore730
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