Term
| The 20 female adults in a small population each have a probability of 0.5 of producing a single offspring each year and a probability of 0.5 of producing no offspring. How many offspring will be produced each year? |
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Definition
| 10 offspring per year on average, with some variation around this average |
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Term
| Which of the following is NOT a factor that limits population growth? |
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Definition
| All of these factors may limit population growth. |
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Term
| A population pyramid that gets wider in shape with higher age groups represents _____ while a population pyramid with nearly parallel lines represents _____. |
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Definition
| declining growth; stationary growth |
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Term
| Density-dependent and density-independent factors influence the growth of a population by causing changes in the: |
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Definition
| birth rate and death rate. |
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Term
| When the hazard factor is low, individuals tend to reproduce: |
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Definition
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Term
| From the following, select the best example of a cohort. |
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Definition
| a group of birds born in the same year |
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Term
| In the equation for logistic growth, when N=K: |
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Definition
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Term
| Population density is determined by the number of: |
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Definition
| individuals of a species in a given area. |
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Term
| How does exponential growth differ from logistic growth? |
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Definition
| The logistic model of growth incorporates environmental limitations on population size. |
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Term
| Natural populations fluctuate through time. One of the forces causing variation in population size is variation in the physical environment, which can have both direct and indirect effects on populations. Variation in population size linked to environmental factors (aside from those which occur daily or seasonally) is likely to: |
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Definition
| be irregular, perhaps even random. |
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Term
| When determining the growth rate of a population, which of the following are NOT important? |
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Definition
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Term
| Which of the following best exemplifies an organism with a Type I survivorship curve? |
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Definition
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Term
| The population size that a particular habitat can support indefinitely is called the: |
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Definition
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Term
| What type of effect has an increasing impact as the population size increases? |
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Definition
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Term
| In years when beech trees produced a large crop of nuts, growth rings were narrow. This is best explained by: |
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Definition
| the tradeoff that exists between growth and reproduction. |
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Term
| A population of meadow voles has an annual per capita birth rate of 0.08 and an annual per capita death rate of 0.02. Estimate the number of individuals added to or lost from a population of 1000 individuals in one year. |
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Definition
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Term
| In an experiment that doubled the average life span of fruit flies, the easiest experimental methodology that worked involved: |
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Definition
| waiting an extra week to collect eggs, thus ensuring that the parents of those eggs were longer-lived than average. |
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Term
| In the lynx–snowshoe hare oscillating cycle of population growth, when the hare population size grows, more food is provided for the lynx. Which is the IMMEDIATE next step in this cycle? |
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Definition
| The lynx reproduce at a higher rate. |
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Term
| A organisms with a slow development and a high investment in their young will most likely have a __________ survivorship curve. |
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Definition
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Term
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Definition
| reflects the number of individuals in various age groups in a population. |
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