Question
Which trophic level is always a necessity in an energy pyramid or food chain?(1 point)
Responses
secondary consumer
secondary consumer
primary consumer
primary consumer
producer
producer
tertiary consumer
producer
In a food chain, with each feeding relationship, the energy transferred from one organism to another will(1 point)
Responses
decrease.
decrease.
remain constant.
remain constant.
increase.
increase.
be independent of the level.
be independent of the level.
decrease.
The black bear is common to North America. Black bears eat many foods, mainly grass, roots, berries, and insects. However, fish and mammals—including those already dead—are also part of their diet. Some tend to wander near campsites and can develop a taste for human food and garbage. Given this information, which term most accurately characterizes black bears? (1 point)
Responses
carnivores
carnivores
decomposers
decomposers
omnivores
omnivores
producers
omnivores
If producers generate 100% of the energy, what percentage of that energy is left by the time it reaches tertiary consumers?(1 point)
Responses
0.1%
0.1%
10%
10%
100%
100%
1%
1%
10%
Animals obtain their nitrogen from(1 point)
Responses
plants.
plants.
nitrites.
nitrites.
bacteria.
bacteria.
nitrates.
plants
Which of the following can be classified as a decomposer?(1 point)
Responses
corn
corn
owl
owl
frog
frog
fungus