Resource Partitioning

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Questions and Answers

An age structure pyramid that is very wide at the bottom and narrows sharply as you move up, displays a growing ______________ population.

  • Stationary
  • Declining
  • Expanding (correct)
  • Stable

If you have an aging population, and not many organisms in their reproductive ages, this population would declining most likely be labeled ______________.

  • Declining (correct)
  • Stationary
  • Stable
  • Expanding

List the 5 things an age structure diagram displays. Gender ________________________________ Reproductive Stage ________________________________ Age ________________________________ Sex Ratios ________________________________ Future Growth ________________________________ Sex _________ ratios

  • Gender, Reproductive Stage, Age, Sex Ratios, Future Growth, Sex
  • Gender, Reproductive Stage, Age, Sex Ratios, Future Growth, Ratios
  • Gender, Reproductive Stage, Age, Sex Ratios, Growth, Sex ratios
  • Gender, Reproductive Stage, Age, Sex Ratios, Future Growth, Sex ratios (correct)

______ explain the proportion of males to females.

<p>Sex ratios (D)</p> Signup and view all the answers

____________________ is the seasonal movement of individuals into and out of an area, creating population fluctuations.

<p>Migration (A)</p> Signup and view all the answers

Using the survivorship curve below, describe how the likelihood of death varies with age between Type I, II, and III organisms. Type I: Offspring, in their younger years, have a HIGH rate of survival. LARGE numbers of these organisms live into old age. Type II: There is equal death among each age interval. Type III: Offspring, in their younger years, have a LOW rate of survival. SMALL numbers of these organisms live into old age.

<p>Type I: High rate of survival in older years, Type II: Equal death among each age interval, Type III: Low rate of survival in younger years (B)</p> Signup and view all the answers

What is the basic difference between density dependent and density independent limiting factors.

<p>Density dependent factors increase as population density increases, while density independent factors do not depend on population density. (C)</p> Signup and view all the answers

Which one of these is a keystone species?

<p>Sea otter (C)</p> Signup and view all the answers

What is the yellow circle labeled in the image?

<p>Climax community (A)</p> Signup and view all the answers

What is the red circle labeled in the image?

<p>Pioneer lichens (B)</p> Signup and view all the answers

What type of succession occurs faster than primary succession?

<p>Secondary succession (A)</p> Signup and view all the answers

What is the importance of pioneer species in preparing the ecosystem for all future life?

<p>They break down rock and add organic matter to create soil (B)</p> Signup and view all the answers

What is the final stage of pond succession shown in the image?

<p>The swamp (A)</p> Signup and view all the answers

Why are Zebra and Quagga mussels considered invasive species?

<p>They out-compete native organisms for resources (B)</p> Signup and view all the answers

What is the reason for the moderate decrease in the population size of Bald Eagles?

<p>Decrease in prey population (A)</p> Signup and view all the answers

What are Keystone species?

<p>Species with strong and/or wide-reaching effects on a community (C)</p> Signup and view all the answers

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