Definitions
Population Growth
Social Behaviors
Symbiosis
Miscellaneous
100
Give an EXAMPLE each: carnivore, herbivore, and omnivore.
answers will bary
100
What shape does a logistical growth pattern take on a graph?
"S" shaped
100
Interspecific Competition is competition within the same species. True or False?
False
It is between TWO different species.
100
A relationship where both organisms benefit (+/+) is called...
Mutualism
100
What is an example of an abiotic factor?
answers will vary
water, humidity, temperature, solar intensity, soil acidity, etc.
200
What is the difference between a food chain and a food web?
Food chains show what eats what. Food webs shows ALL the food webs in an entire ecosystem.
200
What is the equation for logistical growth?
N = Noe(r*t)
200
A pride of lions sharing a kill with other members of its bloodline is what type of social behavior?
Reciprocity
200
If a cow is eating grass and kicks up insects for birds to eat, this is what type of symbiosis?
Commensalism (+/0)
200
The carrying capacity of Earth for humans is what? When will we reach it?
about 10 billion
estimated to be reached by 2050
300
What is a limiting factor?
factors that limit or slow population growth
300
Describe the growth rate for exponential growth over time?
It increases MORE and MORE over time
300
If a mother raven fights off a hawk to help its babies survive, even though it is risky, this behavior is called....
Kin Selection
300
A relationship where one organism benefits at a cost to another (+/-) is called...
Parasitism
300
When were Yellowstone Wolves re-introduced into the wilds?
1995
400
Describe carrying capacity AND what happens to the population graph when it is reached?
the maximum number of individuals an environment can support. the graph plateaus or levels out.
400
What are the three types of population pyramids?
constrictive
expansionary
stationary
400
This social behavior decreases fitness of the individual but increase the success of the whole population
Altruism
400
Why is bees pollinating flowers a mutualistic relationship?
Bees benefit by getting food/energy.
Flowers benefit by getting their genes spread through pollen travelling on bees.
400
Draw linear, exponential, and logistic growth on a graph.
500
Draw a trophic pyramid. Label each level with producers and consumers.
500
A biologist is studying the beaver population in Yellowstone. At t = 0 years, the population is 50 beavers. After 8 years, the biologist counts 142 beavers. What is the exponential growth rate?
N = Noe(r*t)
142 = 50e(8r) 142/50 = 2.84
ln(2.84) = ln(e(8r))
1.04 = 8r 1.04/8 = 0.13
r = 0.13
500
If an adult hamster eats all the seeds in order to prevent the baby hamsters from eating, this is what type of competition?
Exploitative Competition
500
What is a symbiotic relationship?
A connection between 2 organisms that either provides a shared benefit or results in a risk to one organism.
500
What is one event that led to an overall decrease in human population GLOBALLY?
bubonic plague