When a consumer eats a producer, 10 percent of the producer’s energy is passed on to the consumer trophic level. What happens to the other 90 percent?(1 point)
Responses
It is added back to the soil by decomposers.
It is added back to the soil by decomposers.
It is consumed and used by the consumer.
It is consumed and used by the consumer.
It is used by the producer to pass on to the next trophic level.
It is used by the producer to pass on to the next trophic level.
It is used for cell processes or released as heat.
It is used for cell processes or released as heat.
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It is used for cell processes or released as heat.
Why is there less biomass at the top of the energy pyramid?(1 point)
Responses
Secondary and tertiary consumers have bigger ranges, so there are fewer of them because they each need a lot of space.
Secondary and tertiary consumers have bigger ranges, so there are fewer of them because they each need a lot of space.
Secondary and tertiary consumers have to consume a lot more food to support themselves, so there are fewer of them.
Secondary and tertiary consumers have to consume a lot more food to support themselves, so there are fewer of them.
Secondary and tertiary consumers are larger, so there are fewer of them.
Secondary and tertiary consumers are larger, so there are fewer of them.
Secondary and tertiary consumers live longer, so there are fewer of them because they reproduce more slowly.
Secondary and tertiary consumers live longer, so there are fewer of them because they reproduce more slowly.
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Secondary and tertiary consumers have to consume a lot more food to support themselves, so there are fewer of them.
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Question
Using the ten percent rule, determine how many kilocalories of energy the tertiary consumer tuna will receive.
Algae Shrimp Lantern Fish Tuna
135,000 Kcal
(1 point)
Responses

13,500 Kcal
13,500 Kcal

1,350 Kcal
1,350 Kcal

135,000 Kcal
135,000 Kcal

135 Kcal
135 Kcal
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Using the ten percent rule, the tertiary consumer tuna will receive 13,500 Kcal of energy.
4 of 54 of 5 Items
Question
Read the following statements about various species of plants and animals. Based on these statements, which one would most likely be classified as an invasive species?(1 point)
Responses
Species A is a plant from Eurasia. It is often considered a weed by homeowners and killed off by using an herbicide. This plant can be consumed in salads or as a tea and is the first food resource for bees in the spring.
Species A is a plant from Eurasia. It is often considered a weed by homeowners and killed off by using an herbicide. This plant can be consumed in salads or as a tea and is the first food resource for bees in the spring.
Species B is from Europe and can sting people. This species is often farmed in America for their ability to pollinate and provide honey.
Species B is from Europe and can sting people. This species is often farmed in America for their ability to pollinate and provide honey.
Species D, native to Eurasia, has been released in various Amer…
Based on the statements provided, Species A would most likely be classified as an invasive species.
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Question
Use the following formula to find the efficiency of energy transfer between the harbor seal (2,500 Kcal) and a polar bear (375 Kcal).
(Energy level transfered to next level)(Total energy input) × 100
(
)
(
)
×
100
(1 point)
Responses

15%
15%

12%
12%

10%
10%

20%
20%
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To find the efficiency of energy transfer between the harbor seal and the polar bear, we can use the formula:
(Energy level transferred to next level)(Total energy input) × 100
In this case, the energy level transferred to the polar bear is 375 Kcal, and the total energy input from the harbor seal is 2,500 Kcal.
(375 Kcal / 2,500 Kcal) × 100 = 15%
Therefore, the efficiency of energy transfer between the harbor seal and the polar bear is 15%.