| Population Lesson Quiz |
NOTE: This quiz might be automated in the future, but for now, you can print this page and answer all the questions before checking the answers.
- What does deciduous tree mean?
- How long does it take for a new oak tree to start producing acorns?
(a) 5 years (b) 10 years (c) 20 years (d) 40 years- What is the life expectancy of oak trees?
(a) 50 years (b) 100 years (c) 150 years (d) 200 years (e) 250 years- What does defoliate mean?
- How many times a year does a squirrel have baby squirrels, and how many do they typically have?
- Are squirrels (a) carnivores, (b) herbivores, or (c) omnivores?
- What does plumage mean?
- Do hawks like to live in cold weather in the snow?
- Match the terms on the right to the phrases on the left. Do the best match:
(a) The maximum population size that an ecosystem can support (1) producers (b) A group of organisms of the same species living in the same area (2) life expectancy (c) The movement of organisms into an ecosystem (3) carrying capacity (d) The relationship between organisms of the same or different species going after the same resources (4) limiting factors (e) An estimate of how long an organism is expected to live (5) emigration (f) Conditions in the environment that limit a population size (6) population (g) The movement of organisms out of an ecosystem (7) competition (h) The organisms that live at the bottom of the ecological pyramid (8) immigration - What data is needed to be able to predict the growth pattern of a population?
- Under what conditions would a population growth curve follow exponential growth?
- What limits the population growth to a certain level? In other words, why are there S-shaped or sigmoid curves of population growth?
- Provide four different examples of population growth limiting factors.
- Assume a predator and prey populations live in a stable phase where their population sizes don't change much from year to year. Suddenly one year there are drastic changes in their sizes. Can you give three examples of factors or situations that can cause this?
- If you run the model with a combination that produces a stable population balance for both squirrels and hawks, you might have noticed that the stable squirrels' population under that situation is smaller than the stable squirrel population when there are no hawks. Can you explain why?
- What formula would you use to determine population density?
- What are the differences between density-dependent and density-independent factors?
- Are predators a density-dependent or density-independent limiting factor for a population growth?
- How can one calculate the carrying capacity of a given species in an ecosystem?
- You may have noticed that in the population charts used by the program, the maximum value (or carrying capacity) for all the different organisms is known. How can this be?
- Let's assume that there is a stable food chain and that suddenly the number of primary consumer individuals goes down to half. What would you expect would happen to the producer and to the secondary consumer?
- In a marsh ecosystem there are grasshoppers which are herbivores and frogs which feed on the grasshoppers. Which of the two populations do you expect to have more individuals and why?
- Based on the model used in this lesson, how many squirrels and how many hawks can a single oak tree sustain?
- Describe what a food web is.
- What makes the logistic equation so interesting?
Last Updated: Monday, 13-Nov-2000 05:22:04 GMT
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