Are most invasive (exotic) species K-selected or r-selectedspecies? Explain your choice and why that makes sense in terms oftheir ecological success.
Briefly define a community and an ecosystem and describe how thetwo are interrelated.
Which of the following levels of organization are in order, fromsimplest to most complex.
a. population, organism, community, ecosystem
b. community, ecosystem, population,organism
c. organism, community, population, ecosystem
d. population, ecosystem, organism, community
e. organism, population, community, ecosystem
Mosses growing on bare rock will eventuallyhelp to create soil. These mosses are involved in ___succession.
a. primary
b. secondary
c. tertiary
If a farmer sprays a pesticide onto a field and kills half ofthe insect pests, he has caused a reduction in________.
a. field capacity
b. carrying capacity
c. population size
d. More than one of the above
What type of survivorship curve would you expect for a plantspecies in which only a few seeds are produced and most of thesesurvive to produce adult plants?
a. type I
b. type II
c. type III
An ecological niche is an organism's_______ in anecosystem.
a. location
b. habitat
c. resources
d. function
No matter how rapidly populations grow, they eventually reach alimit and begin to stabilize. This is called the______________.
Unicellular algae live in the tissues of coral animals. Thealgae provide food for the coral, while the coral provides a stablehome for the algae. This is an example of
a. Parasitism
b. Commensalism
c. Mutualism
The vast majority of energy taken into an ecosystemis____________.
a. converted into biomass by plants.
b. utilized by secondary consumers.
c. lost as heat.
d. used by the primary consumers.
e. concentrated in the decomposers.
A farmer is using an insecticide to treat his crops. While mostinsects do not survive their first exposure to the insecticide somehave a gene that enables them to survive. When these survivorsreproduce they will likely pass along this resistance to theiroffspring. This results in an increase in numbers of the insectsover time. Which of the following processes applies to thissurvival?
a. cloning
b. mutation
c. natural selection
d. genetic engineering
What is the ecological relationship between insects andcrops?
a. mutualism
b. competition
c. predation
Sea anemones growing on the backs of crabs without damaging thecrabs are an example of
a. Parasitism
b. Commensalism
c. Mutualism
Which of these is a population density-independent regulatingfactor?
a. Competition
b. Predation
c. Size of population
d. Weather
e. Resource availability
Producers are_________.
a. Autotrophs
b. Herbivores
c. Omnivores
d. Carnivores
If biological magnification occurs, the ___ will have thehighest levels of toxins in their systems.
a. producers
b. herbivores
c. primary carnivores
d. top carnivores
Given the amount of sunlight that hits the plants on our planet,and the ability of plants for rapid growth and reproduction, howcome we arenât all hip deep in dead plants?
