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
fungus
Select the most accurate example of a food chain.(1 point)
Responses
snake → rabbit → grass → hawk
snake → rabbit → grass → hawk
rabbit → hawk → grass → snake
rabbit → hawk → grass → snake
hawk → snake → rabbit → grass
hawk → snake → rabbit → grass
grass → rabbit → snake → hawk
grass → rabbit → snake → hawk
snake → rabbit → grass → hawk
explain
In a food chain, energy flows from one organism to another through feeding relationships. The first organism in the chain is typically a producer, such as plants or algae, which convert sunlight into usable energy through the process of photosynthesis. The energy from the producers is then transferred to the primary consumers, which are herbivores that feed directly on the producers. In the given example, the snake is the primary consumer as it feeds on the rabbits, which are herbivores that consume grass. The energy is then transferred from the primary consumers (rabbits) to the secondary consumers (snake) through predation. Finally, the energy reaches the tertiary consumers, represented by the hawk, which feeds on the primary consumers (snake). This example of the food chain illustrates the transfer of energy from the producer (grass) to the primary consumer (rabbit), followed by the secondary consumer (snake), and ultimately reaching the tertiary consumer (hawk).
so the food chain is actually
grass → rabbit → snake → hawk
Which of the following can be classified as a producer?(1 point)
Responses
corn
corn
snake
snake
deer
deer
bear