Populations and Interactions

Which of the following is the formula for determining the rate of growth of a population?
1. (birth rate + immigration rate) - (death rate + emigration rate)
2. (birth rate - death rate) + immigration rate + emigration rate
3. birth rate + death rate + immigration rate + emigration rate
4. (immigration rate + emigration rate) - (death rate + birth rate)
As a population grows, factors that slow or limit the growth of the population include
1. disease and parasitism
2. immigration
3. predation
4. competition for resources
Creative commons attribution: copyright Dan L. Perlman, 1988

The caterpillar pictured here has wasp pupae attached that will hatch and then consume the caterpillar. This relationship is an example of
1. sexual selection
2. commensalism
3. mutualism
4. parasitism
Creative commons attribution: copyright Dan L. Perlman, 1988

Ants are known to protect, or "tend" aphids from predators, and in return receive some nutrients from the aphids. This relationship is an example of
1. sexual selection
2. commensalism
3. mutualism
4. parasitism
The growth curve shown above is an example of
1. exponential growth
2. logistic growth
3. extinction
4. a predator-prey relationship
In the growth curve shown above, the red line indicates
1. K, the carrying capacity
2. the y-intercept
3. the death rate
4. the reproductive rate
The growth curve shown above is an example of
1. exponential growth
2. logistic growth
3. extinction
4. a predator-prey relationship
Examples of symbiotic relationships include
1. mutualism
2. commensalism
3. parasitism
4. cannabalism
Which of the following is an example of a community?
1. All of the organisms living within a lake.
2. All of the geese in the world.
3. All of the grass in a meadow.
4. All of the animals in North America.
Which of the following is an example of a population?
1. All of the raccoons in a forest
2. All of the mammals in a forest
3. All of the trees in a forest
4. All of the raccoons in North America
The image above is a population graph from the predator-prey game. Green indicates grass, blue indicates rabbits, and red indicates wolves. In this graph, the factor controlling the population of rabbits is:
1. the availability of food
2. the presence of predators
3. the presence of predators and the availability of food
4. competition from other herbivores
The image above is a population graph from the predator-prey game. Green indicates grass, blue indicates rabbits, and red indicates wolves. The rapid growth in grass shown at the right of the graph is probably due to:
1. wolves controlling the rabbit population
2. rabbits going on diets
3. rabbits becoming extinct
4. wolves becoming extinct
The growth curve above indicates that in this population
1. extinction has occurred
2. births + immigration = deaths + emigration
3. births + emigration = deaths + immigration
4. the ecosystem must be at its carrying capacity
The image above is a population graph from the predator-prey game. Green indicates grass, blue indicates rabbits, and red indicates wolves. Wolves appear to have gone extinct because:
1. there was no grass for rabbits to eat
2. they starved after eating all of the rabbits
3. they ran out of grass to eat
4. other predators replaced them
Bees collect nectar from flowers, and serve as pollinators for the plants. This relationship is an example of
1. mutualism
2. predator-prey
3. commensalism
4. parasitism
In this diagram the predator is coded in ____________ and the prey is coded in ____________.
1. blue / red
2. red / blue
As this diagram indicates, human population is distributed in a pattern of
1. random dispersion
2. clumped dispersion
3. uniform dispersion
A relationship between two organisms of different species in which one benefits, while the other neither benefits nor is harmed:
1. symbiosis
2. mutualism
3. commensalism
4. parasitism