Miscellaneous
What is the independent variable in an experiment?
What is the variable that is manipulated by the scientist
What are the stages of primary succession?
Stage 1: Pioneer Species (Lichens)
Stage 2: Mosses and Ferns
Stage 3: Grasses and Wildflowers
Stage 4: Shrubs and Small Softwood Trees
Stage 5: Larger Hardwood Trees
What are the sub-categories of biodiversity?
Look at white boards for correct answer
Crude births - crude deaths / 10
What is the dependent variable in an experiment?
What is the variable that is being measured (it depends on the changes of the independent variable)
When does secondary succession occur?
What are the 4 steps in the process of Eutrophication?
What are excess nutrients creating an algal bloom which turns into oxygen depletion for aquatic organisms underneath the algae, which causes dead zones.
Draw an exponential growth curve and label the parts of the graph correctly.
Look at white boards for the answer
If Italy had a crude birth rate of 7 and a crude death rate of 11, what is the population growth rate for Italy?
-0.4%
What is mutualism?
What is a relationship where each organism benefits
Which type of succession occurs after a volcanic eruption? Why?
Give one example of a conservation effort and describe it.
Captive Breeding Programs
National/State Parks
Prevent Habitat Loss and Habitat Fragmentation
Habitat Restoration Efforts
What is a density-dependent factor and give one example.
What is a factor that depends on the number of individuals in the population. Example: diseases, competition, overcrowding
If there are 150 cactus plants per square mile in the desert, which population characteristic is this referring to?
What is population density
Barnacles on a whale
What is commensalism
What is a climax community?
What is a successful population of long-lived plant species that last for a very long time. They may not always be the end result of succession, but the climax community had a major impact in re-establishing a habitat and ecosystem in ecological succession.
What is biological magnification?
Pollutants continually build up as they move through each trophic level. Organisms are unable to break them down and get rid of them, so the pollutants "magnify" at each level.
A limiting factor that does not depend on the number of individuals in the population, they will be affected regardless of population size. Examples: eruption of a volcano, drought, hurricane.
Describe carrying capacity of a population
Carrying capacity is the max number of individuals that a population can support.
Identify the independent and dependent variable in the scenario below:
The growth of microbial populations in nature is dynamic, as the cellular physiology and environment of these populations change. Population dynamics have wide-ranging consequences for ecology and evolution, determining how species interact and what limits each population. Scientists wanted to see how nutrient availability affected microbial populations. They set up three petri dishes and introduced E. Coli to all three petri dishes. All three petri dishes were contained at the same temperature level and exposed to the same amount of sunlight. The first petri dish had one gram of sugar added, the second petri dish had five grams of sugar added, and the third petri dish was given no sugar. The scientists then measured the size of each E. Coli population at the end of three days.
Independent Variable: The amount of sugar added to each petri dish
Dependent Variable: The size of each E. Coli population at the end of three days
What type of succession occurs when a farmer has abandoned his field?
What is secondary succession
Differentiate between renewable and nonrenewable resources and give an example of each.
Nonrenewable resources are used up more quickly than they can be naturally reproduced, whereas renewable resources are naturally replenished as they are used (at a faster rate or the same rate).
Explain two ways that a population could see a decrease and two ways that a population could see an increase within the year.
Decrease: Emigration and Death
Increase: Immigration and Births
If the growth rate of the United States is 0.92% and they had 308,254,624 people in 2010, approximately how many people will there be in 2020?
336,614,044 people in 2020