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

11 answers

The term that most accurately characterizes black bears is omnivores. This is because they eat a variety of foods, including plants (grass, roots, berries), insects, fish, and mammals.

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%

By the time energy from producers reaches tertiary consumers, typically only about 0.1% of the original energy is left. This is due to the loss of energy at each trophic level, primarily through metabolic processes and heat. Therefore, the correct response is 0.1%.

Animals obtain their nitrogen from(1 point)
Responses

plants.
plants.

nitrites.
nitrites.

bacteria.
bacteria.

nitrates.

Animals obtain their nitrogen from plants. Plants absorb nitrogen from the soil in the form of nitrates and nitrites, and then animals gain nitrogen by consuming these plants (herbivores) or other animals that have consumed plants (carnivores). Therefore, the correct response is plants.

Which of the following can be classified as a decomposer?(1 point)
Responses

corn
corn

owl
owl

frog
frog

fungus

The correct response is fungus. Fungi are classified as decomposers because they break down dead organic material and recycle nutrients back into the ecosystem.

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

The most accurate example of a food chain is grass → rabbit → snake → hawk. This sequence correctly represents the flow of energy from a producer (grass) through primary consumers (rabbit), secondary consumers (snake), to tertiary consumers (hawk).

Which of the following can be classified as a producer?(1 point)
Responses

corn
corn

snake
snake

deer
deer

bear
bear

The correct response is corn. Corn is a plant and can photosynthesize, which allows it to produce its own energy, making it a producer in the ecosystem.