Have an account?
What is the original source of almost all energy in most ecosystems?
Plants as well as green algae and some bacteria occupy which trophic level?
What is the primary difference between a food chain and a food web?
Food chains are complex and food webs are simple in nature
Food chains are simple and food webs are complex in nature
Food chains contain more organisms than food web
Food webs contain less organisms than food chains
Which of the following is NOT an example of a heterotroph?
There are usually no more than four trophic levels in a food chain. Which best explains why this is true?
A shortage of organisms would prevent more than four trophic levels.
The energy lost through a food chain prevents the support of more than four trophic levels.
Competition at the lower levels eliminates the need for more than four trophic levels.
Decomposers would be unable to break down the waste materials produced by more than four trophic levels.
What can happen in an ecosystem if the number of predators in an area rapidly decreases?
A decrease in the number of prey
A balancing out of the predator prey population
The prey population will probably overpopulate for a period of time.
There will be no change.
Which of the following is the largest level of organization in ecology, made up of biotic and abiotic factors?
Which is a biotic factor that affects the size of a population in a specific ecosystem?
Average temperature of the ecosystem
Type of soil in the ecosystem
Number and kinds of predators in the ecosystem
Concentration of oxygen in the ecosystem
Which organism is considered primary consumers?
Giant sea bass
Classify the relationship between flowering plants and bees, where the plant provides the bee with food and the bee spreads pollen for the plant.
Predator – prey
Young sea turtles head for the ocean immediately after they hatch. This behavior is most likely
Learned through trial and error
The result of habituation
1. People who move into an apartment near railroad tracks are awakened at night each time they hear a train go by. After about a week, they can sleep through the night, even though the trains continue to run on the same schedule. The change in their sleeping behavior is an example of
In a particular ecosystem, a wolf population is a predator for moose. If the wolf population decreased, what would likely happen to the carrying capacity of the environment for the moose?
It would increase
It would decrease slightly
It would remain the same
It would decrease significantly.
As resources in a population become less available, the population
Reaches carrying capacity
Enters a phase of exponential growth