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Ecology Practice Problem 1

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Wize University Biology Textbook > Ecology

Species Interactions

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  1. Grab a piece of paper and try this problem yourself.
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Lichen attaches to trees and slowly breaks them down in order to obtain nutrients to increase their fitness. This is an example of what type of relationship?

a) Predatory
b) Mutualism
c) Parasitism
d) Decomposition



More Species Interactions Questions:
Which of the following is NOT a density-dependent control that influences the black crow population size?
In a forest community three species of rodents exists: mice, rats and voles. All three species eat the same types of nuts although they eat only what is appropriate for their size. A snake species that lives in this forest preys on all three rodents. One year, due to human intervention, the snake population is largely depleted and remains low for several years. Following this low species population there is an increase in the population of the rats while the voles and mice population decreases. What can be said about the snake in this ecosystem?
Lichen attaches to trees and slowly breaks them down in order to obtain nutrients to increase their fitness. This is an example of what type of relationship?
a) Predatory
b) Mutualism
The symbiosis in which one species benefits and the other is always harmed is known as:
Which of the following terms describes a group of organisms of a single species that live in the same space, same time and reproduce with one another?
You are studying a population of ferrets with the following life table.
a) Fill in the missing data in the table.
b) The ferret population keeps increasing due to excess resources and lack of predators. To control this population there is a decision to prevent all ferrets from class 2-3 to mate or to sterilize all ferrets in class 3-4. Which of the above strategies will be more effective in slowing the population growth?
In a forest community three species of rodents exists: mice, rats and voles. All three species eat the same types of nuts although they eat only what is appropriate for their size. A snake species that lives in this forest preys on all three rodents. One year, due to human intervention, the snake population is largely depleted and remains low for several years. Following this low species population there is an increase in the population of the rats while the voles and mice population decreases.
What can be said about the snake in this ecosystem?
A mosquito taking blood from a human is an example of what type of relationship?
Sea anemones contain venom to paralyze their prey, but clownfish are resistant to this venom and so use the anemone as their niche.
This is an example of what type of relationship?
What prevents predator population from completely eliminating prey populations?
Lichen attaches to trees and slowly breaks them down in order to obtain nutrients to increase their fitness.
This is an example of what type of relationship?
Which of the following is NOT a density-dependent control that influences the black crow population size?
You are studying a population of ferrets with the following life table.
The ferret population keeps increasing due to excess resources and lack of predators. To control this population there is a decision to prevent all ferrets from class 2-3 to mate or to sterilize all ferrets in class 3-4.
Which of the above strategies will be more effective in slowing the population growth, option 1 or option 2?
What factors place limits on the logistic model of growth?
In a forest community three species of rodents exists: mice, rats and voles. All three species eat the same types of nuts although they eat only what is appropriate for their size. A snake species that lives in this forest preys on all three rodents. One year, due to human intervention, the snake population is largely depleted and remains low for several years. Following this low species population there is an increase in the population of the rats while the voles and mice population decreases. What can be said about the snake in this ecosystem?
What prevents predator population from completely eliminating prey populations?
Ecology Practice Problem 3
In a forest community three species of rodents exists: mice, rats and voles. All three species eat the same types of nuts although they eat only what is appropriate for their size. A snake species that lives in this forest preys on all three rodents. One year, due to human intervention, the snake population is largely depleted and remains low for several years. Following this low species population there is an increase in the population of the rats while the voles and mice population decreases. What can be said about the snake in this ecosystem?
It was found that guppies (live-bearing fish), when raised in predator free waters, produce larger sized offspring that mature slowly.
This is in comparison to guppies raised in the presence of predators whereby the progeny are smaller, mature quicker and reproduce earlier.
What phenomena is occurring?
The species interaction in which one species benefits and the other is always harmed is known as which of the following? Choose all that apply.
What is a symbiotic relationship?
Sea anemones contain venom to paralyze their prey, but clownfish are resistant to this venom and so use the anemone as their niche. This is an example of what type of relationship?
Consider a species of forest flower that varies in colour from white to pink to bright red. Aphids prefer to eat the coloured flowers over the white ones, and pollinators prefer this colour as well (therefore have better reproductive success). The percentage of different flower colours remains stable from year to year, however if all aphids are removed what would you expect to happen in the distribution of flower colours?
Practice: Frog Evolution Scenario
Consider the following scenario. Answer all questions using key terminologies and justifications.
A tropical rainforest supports a species of poison dart frog which feeds primarily on a local tree beetle. Providing the weather is constant, and food is plentiful, this species continues to breed and populate the ecosystem. Further, the ratio of males and females is equal so no competitive mating is occurring and the entire species is phenotypically identical.
a) Providing the above situation is maintained, will these species evolve in the next 1000 years? Justify your answer.
Which of the following statements is correct?
As the population of black crows increases in January, which of the following is true?
A mosquito taking blood from a human is an example of what type of relationship?
Sea anemones contain venom to paralyze their prey, but clownfish are resistant to this venom and so use the anemone as their niche. This is an example of what type of relationship?