16 Questions
An age structure pyramid that is very wide at the bottom and narrows sharply as you move up, displays a growing ______________ population.
Expanding
If you have an aging population, and not many organisms in their reproductive ages, this population would declining most likely be labeled ______________.
Declining
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 ratios
______ explain the proportion of males to females.
Sex ratios
____________________ is the seasonal movement of individuals into and out of an area, creating population fluctuations.
Migration
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.
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
What is the basic difference between density dependent and density independent limiting factors.
Density dependent factors increase as population density increases, while density independent factors do not depend on population density.
Which one of these is a keystone species?
Sea otter
What is the yellow circle labeled in the image?
Climax community
What is the red circle labeled in the image?
Pioneer lichens
What type of succession occurs faster than primary succession?
Secondary succession
What is the importance of pioneer species in preparing the ecosystem for all future life?
They break down rock and add organic matter to create soil
What is the final stage of pond succession shown in the image?
The swamp
Why are Zebra and Quagga mussels considered invasive species?
They out-compete native organisms for resources
What is the reason for the moderate decrease in the population size of Bald Eagles?
Decrease in prey population
What are Keystone species?
Species with strong and/or wide-reaching effects on a community
Quiz on Resource Partitioning: Explore how organisms reduce competition by utilizing different methods to acquire resources. Learn about their niche and functional role in the environment through a descriptive image.
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