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Bio 1B SG6P1
| Question | Answer |
|---|---|
| Population | a group of organisms of the same species living in the same place |
| Population density | measures the number of individual organisms living in a defined space |
| Survivorship curve | a graphic representation of mortality patterns |
| exponential growth | Population grows without limit |
| logistic growth | Population grows quickly at first and then levels off |
| carrying capacity | The theoretical maximum population that a given environment could support. |
| limiting factors | aspects of the environment that limit the size a population can reach |
| biotic | living; food source, mates |
| abiotic | nonliving; water, temperature |
| density dependent | have a bigger impact on more dense populations, and are triggered by an increase in population size; ex. competition, predation, parasitism, disease |
| density independent | regulate population growth regardless of size or density. nearly all species in an ecosystem are affected equally; ex. weather changes, pollution, natural disasters |
| list the factors that contribute to a high population density vs a low population density | high pop density = birth, immigration low pop density = death, emigration |
| explain the difference between logistic and exponential population growth | exp pop growth: resources are unlimited, resulting in a J-shaped curve. In logistic growth, pop expansion decreases as resources become scarce. It levels off when the carrying capacity of the environment is reached, resulting in an S-shaped curve. |
| cite specific examples of each type of limiting factor | Some examples of limiting factors are biotic, like food, mates, and competition. Others are abiotic, like temperature & the amount of sunlight available in an environment. |
| SKETCH AND LABEL an example of the different types of survivorship curves. briefly describe each one. | Type 1: Late loss; heavy parental care; Ex. Humans Type 2: Constant loss; mortality unaffected by age; Ex. some birds, rodents Type 3: Early loss; produce lots of offspring at once and many die right away; Ex. fish, mosquitoes |
| SKETCH AND LABEL a picture of the three types of dispersion patterns. | Random, Uniform/Even, Clumped |
Created by:
jewlsasterr
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