Question
Food Webs and Energy Pyramids
Video Player
Question 1
1. What is the primary source of energy in most ecosystems?(1 point)
Responses
sunlight
sunlight
producers
producers
consumers
consumers
decomposers
decomposers
Question 2
2. In an energy pyramid, which trophic level typically contains the greatest amount of energy?(1 point)
Responses
secondary consumers
secondary consumers
tertiary consumers
tertiary consumers
primary consumers
primary consumers
producers
producers
Question 3
3. Which of the following best describes the role of decomposers in an ecosystem's food web?(1 point)
Responses
They consume primary consumers for energy.
They consume primary consumers for energy.
They break down organic matter and return nutrients to the soil.
They break down organic matter and return nutrients to the soil.
They produce energy through photosynthesis.
They produce energy through photosynthesis.
They directly compete with producers for resources.
They directly compete with producers for resources.
Question 4
4. Energy decreases as it moves up trophic levels. If the producer level in a given energy pyramid contained 1,000 kilocalories, what would be the available amount of energy in the primary consumer level?(1 point)
Responses
10 kcal
10 kcal
100 kcal
100 kcal
1,000 kcal
1,000 kcal
10,000 kcal
10,000 kcal
Question 5
5. How does biodiversity contribute to the sustainability and resilience of an ecosystem?(1 point)
Responses
By providing multiple food sources
By providing multiple food sources
By decreasing competition
By decreasing competition
By eliminating predators
By eliminating predators
By standardizing food chains
By standardizing food chains
Video Player
Question 1
1. What is the primary source of energy in most ecosystems?(1 point)
Responses
sunlight
sunlight
producers
producers
consumers
consumers
decomposers
decomposers
Question 2
2. In an energy pyramid, which trophic level typically contains the greatest amount of energy?(1 point)
Responses
secondary consumers
secondary consumers
tertiary consumers
tertiary consumers
primary consumers
primary consumers
producers
producers
Question 3
3. Which of the following best describes the role of decomposers in an ecosystem's food web?(1 point)
Responses
They consume primary consumers for energy.
They consume primary consumers for energy.
They break down organic matter and return nutrients to the soil.
They break down organic matter and return nutrients to the soil.
They produce energy through photosynthesis.
They produce energy through photosynthesis.
They directly compete with producers for resources.
They directly compete with producers for resources.
Question 4
4. Energy decreases as it moves up trophic levels. If the producer level in a given energy pyramid contained 1,000 kilocalories, what would be the available amount of energy in the primary consumer level?(1 point)
Responses
10 kcal
10 kcal
100 kcal
100 kcal
1,000 kcal
1,000 kcal
10,000 kcal
10,000 kcal
Question 5
5. How does biodiversity contribute to the sustainability and resilience of an ecosystem?(1 point)
Responses
By providing multiple food sources
By providing multiple food sources
By decreasing competition
By decreasing competition
By eliminating predators
By eliminating predators
By standardizing food chains
By standardizing food chains
Answers
GPT-4o mini
Here are the correct answers for each question:
**Question 1:**
What is the primary source of energy in most ecosystems?
- **Answer:** **sunlight**
**Question 2:**
In an energy pyramid, which trophic level typically contains the greatest amount of energy?
- **Answer:** **producers**
**Question 3:**
Which of the following best describes the role of decomposers in an ecosystem's food web?
- **Answer:** **They break down organic matter and return nutrients to the soil.**
**Question 4:**
Energy decreases as it moves up trophic levels. If the producer level in a given energy pyramid contained 1,000 kilocalories, what would be the available amount of energy in the primary consumer level?
- **Answer:** **100 kcal**
*Explanation: Energy typically decreases by about 90% at each trophic level, following the 10% rule, so from 1,000 kcal of producers, the primary consumers would receive around 100 kcal.*
**Question 5:**
How does biodiversity contribute to the sustainability and resilience of an ecosystem?
- **Answer:** **By providing multiple food sources**
Biodiversity can enhance ecosystem stability and resilience by providing a wider variety of resources and food sources, thus enabling ecosystems to better withstand disturbances.
**Question 1:**
What is the primary source of energy in most ecosystems?
- **Answer:** **sunlight**
**Question 2:**
In an energy pyramid, which trophic level typically contains the greatest amount of energy?
- **Answer:** **producers**
**Question 3:**
Which of the following best describes the role of decomposers in an ecosystem's food web?
- **Answer:** **They break down organic matter and return nutrients to the soil.**
**Question 4:**
Energy decreases as it moves up trophic levels. If the producer level in a given energy pyramid contained 1,000 kilocalories, what would be the available amount of energy in the primary consumer level?
- **Answer:** **100 kcal**
*Explanation: Energy typically decreases by about 90% at each trophic level, following the 10% rule, so from 1,000 kcal of producers, the primary consumers would receive around 100 kcal.*
**Question 5:**
How does biodiversity contribute to the sustainability and resilience of an ecosystem?
- **Answer:** **By providing multiple food sources**
Biodiversity can enhance ecosystem stability and resilience by providing a wider variety of resources and food sources, thus enabling ecosystems to better withstand disturbances.