1.
Each level of a food chain is called a _________ level.
Correct Answer
B. Tropical
Explanation
Each level of a food chain is referred to as a "trophic" level, indicating the position of an organism in the hierarchy of energy transfer.
2.
Which of these is not a typical primary producer in a terrestrial ecosystem?
Correct Answer
B. Oak Tree
Explanation
In terrestrial ecosystems, primary producers like "grass" play a vital role in initiating the food chain by converting sunlight into energy through photosynthesis. While "oak trees" are important components of the ecosystem, they are not primary producers in the same sense as grasses.
3.
After the first producer, the next members of the food chain will be consumers. Consumers must eat __________ ______________ to survive.
Correct Answer
B. Living organisms
Explanation
Consumers in a food chain must consume living organisms (other consumers, producers, etc.) to obtain the energy they need to survive.
4.
Producers are called ______________________, while consumers are called heterotrophs.
Correct Answer
A. AutotropHs
Explanation
Producers, such as plants, are referred to as autotrophs because they can produce their own energy through photosynthesis. Consumers, on the other hand, are heterotrophs, as they rely on others for their energy.
5.
The length of a food chain is measured by the number of _____________ encountered as energy moves from the autotroph to the top consumers.
Correct Answer
B. Tropic levels
Explanation
The length of a food chain is determined by the number of "trophic levels" it comprises, representing the different stages of energy transfer from primary producers to top consumers.
6.
Series of interrelated food chains in a given ecosystem is called a ______________.
Correct Answer
A. Food web
Explanation
A "food web" is a complex, interconnected system of various food chains in an ecosystem, illustrating the interdependence of organisms and their roles in energy flow.
7.
A food chain is a series of relationships between members of an ecosystem so that _________ can be transferred between them.
Correct Answer
A. Energy
Explanation
A food chain represents the flow of "energy" from one organism to another within an ecosystem as they consume and are consumed by one another.
8.
As energy is transferred through a food chain, only 10-20 percent of the energy is available to the next member of the chain. This is because
Correct Answer
A. Energy is lost as heat through respiration
Explanation
Energy is lost as heat during each step of the food chain due to metabolic processes like respiration, limiting the amount of energy available to higher trophic levels.
9.
An example of a food chain in a pond environment would be: algae: water bug: fish: otter. In this example the __________ is at the bottom of the food chain.
Correct Answer
B. Algae
Explanation
Algae, as primary producers, are at the "bottom" of the food chain in this pond ecosystem, initiating the transfer of energy.
10.
An example of a forest food chain could be: pinenut (from a tree): squirrel: fox: bacteria. In this example, the food chain ends with
Correct Answer
B. Bacteria
Explanation
In this forest food chain, the food chain ends with "bacteria" responsible for decomposing organic matter and returning nutrients to the ecosystem.