Question
The emerald ash borer is an invasive beetle from Asia that was discovered in Michigan in 2002. The larvae feed on the inner bark of ash trees, decreasing the tree’s ability to move water and nutrients from the roots to the leaves. Since its discovery, it has killed hundreds of millions of ash trees in North America.
Ash trees are a primary producer. What will happen to the rest of the food chain (primary consumers, secondary consumers, etc.) if the trees continue to die off at such a rapid rate?(1 point)
Primary and secondary consumers would have to rely on human intervention in the form of ecosystem restoration and invasive species eradication to survive.
Primary and secondary consumers would have to rely on human intervention in the form of ecosystem restoration and invasive species eradication to survive.
Primary consumers would have to find new resources while secondary consumers would be unaffected and continue to eat the primary consumers.
Primary consumers would have to find new resources while secondary consumers would be unaffected and continue to eat the primary consumers.
Primary consumers would increase to compete with the beetles, causing secondary and tertiary consumers to increase as a result.
Primary consumers would increase to compete with the beetles, causing secondary and tertiary consumers to increase as a result.
Primary consumer populations would decrease, causing secondary and tertiary consumers to decrease as well.
Ash trees are a primary producer. What will happen to the rest of the food chain (primary consumers, secondary consumers, etc.) if the trees continue to die off at such a rapid rate?(1 point)
Primary and secondary consumers would have to rely on human intervention in the form of ecosystem restoration and invasive species eradication to survive.
Primary and secondary consumers would have to rely on human intervention in the form of ecosystem restoration and invasive species eradication to survive.
Primary consumers would have to find new resources while secondary consumers would be unaffected and continue to eat the primary consumers.
Primary consumers would have to find new resources while secondary consumers would be unaffected and continue to eat the primary consumers.
Primary consumers would increase to compete with the beetles, causing secondary and tertiary consumers to increase as a result.
Primary consumers would increase to compete with the beetles, causing secondary and tertiary consumers to increase as a result.
Primary consumer populations would decrease, causing secondary and tertiary consumers to decrease as well.
Answers
Answered by
GPT-4o mini
The most accurate answer is: **Primary consumer populations would decrease, causing secondary and tertiary consumers to decrease as well.**
As ash trees die off due to the emerald ash borer infestation, the primary consumers that rely on ash trees for food (e.g., certain insects, herbivores) would face a significant reduction in their food source. This decline would lead to a decrease in primary consumer populations. Subsequently, secondary consumers (predators that feed on primary consumers) would also decline due to the reduced availability of their prey. Consequently, tertiary consumers would also see a decrease, forming a cascading effect throughout the food chain.
As ash trees die off due to the emerald ash borer infestation, the primary consumers that rely on ash trees for food (e.g., certain insects, herbivores) would face a significant reduction in their food source. This decline would lead to a decrease in primary consumer populations. Subsequently, secondary consumers (predators that feed on primary consumers) would also decline due to the reduced availability of their prey. Consequently, tertiary consumers would also see a decrease, forming a cascading effect throughout the food chain.
Answer
In a river ecosystem, algae are the producers. The primary consumers of algae are fish, which are consumed by storks, which are consumed by crocodiles.
If there are 100,000 kilograms of producers in this ecosystem, how many kilograms of secondary consumers can be supported?
(1 point)
Responses
1,000
1,000
100
100
10,000
10,000
10
If there are 100,000 kilograms of producers in this ecosystem, how many kilograms of secondary consumers can be supported?
(1 point)
Responses
1,000
1,000
100
100
10,000
10,000
10
Answered by
GPT-4o mini
In an ecological pyramid, energy decreases as you move up through the trophic levels. Typically, only about 10% of the energy from one level is transferred to the next level (this is known as the 10% rule).
In this ecosystem:
- **Producers (algae)**: 100,000 kg
- **Primary Consumers (fish)**: These would be able to utilize about 10% of the producers' biomass, so:
\( 100,000 \, \text{kg} \times 0.10 = 10,000 \, \text{kg} \) (fish)
- **Secondary Consumers (storks)**: Again, applying the 10% rule to the primary consumers:
\( 10,000 \, \text{kg} \times 0.10 = 1,000 \, \text{kg} \) (storks)
Thus, the amount of secondary consumers that can be supported is **1,000 kilograms**.
In this ecosystem:
- **Producers (algae)**: 100,000 kg
- **Primary Consumers (fish)**: These would be able to utilize about 10% of the producers' biomass, so:
\( 100,000 \, \text{kg} \times 0.10 = 10,000 \, \text{kg} \) (fish)
- **Secondary Consumers (storks)**: Again, applying the 10% rule to the primary consumers:
\( 10,000 \, \text{kg} \times 0.10 = 1,000 \, \text{kg} \) (storks)
Thus, the amount of secondary consumers that can be supported is **1,000 kilograms**.
Answer
Which organism makes up the primary producer trophic level?(1 point)
Responses
plants
plants
predators
predators
herbivores
herbivores
consumers
Responses
plants
plants
predators
predators
herbivores
herbivores
consumers
Answered by
GPT-4o mini
The correct response is **plants**.
In an ecosystem, primary producers are typically organisms that can produce their own food through photosynthesis, such as plants and algae. They form the base of the food chain by converting sunlight into energy, which is then available for primary consumers (herbivores) and higher trophic levels.
In an ecosystem, primary producers are typically organisms that can produce their own food through photosynthesis, such as plants and algae. They form the base of the food chain by converting sunlight into energy, which is then available for primary consumers (herbivores) and higher trophic levels.
Answer
A secondary consumer receives 200 kcal
from primary consumers. If the primary consumer originally received 2,000 kcal
from producers, what does this indicate about the efficiency of energy transfer from primary to secondary consumers?(1 point)
Responses
The energy transfer is 50%
, showing that half of the energy is used effectively for maintenance or lost as heat.
The energy transfer is 50 percent , showing that half of the energy is used effectively for maintenance or lost as heat.
The energy transfer is 10%
, with most energy being used by primary consumers for growth and maintenance.
The energy transfer is 10 percent , with most energy being used by primary consumers for growth and maintenance.
The energy transfer is 100%
, indicating that no energy or mass is lost between trophic levels.
The energy transfer is 100 percent , indicating that no energy or mass is lost between trophic levels.
There is no energy loss because secondary consumers use all available energy.
from primary consumers. If the primary consumer originally received 2,000 kcal
from producers, what does this indicate about the efficiency of energy transfer from primary to secondary consumers?(1 point)
Responses
The energy transfer is 50%
, showing that half of the energy is used effectively for maintenance or lost as heat.
The energy transfer is 50 percent , showing that half of the energy is used effectively for maintenance or lost as heat.
The energy transfer is 10%
, with most energy being used by primary consumers for growth and maintenance.
The energy transfer is 10 percent , with most energy being used by primary consumers for growth and maintenance.
The energy transfer is 100%
, indicating that no energy or mass is lost between trophic levels.
The energy transfer is 100 percent , indicating that no energy or mass is lost between trophic levels.
There is no energy loss because secondary consumers use all available energy.
Answered by
GPT-4o mini
The correct response is: **The energy transfer is 10%, with most energy being used by primary consumers for growth and maintenance.**
Here's why:
- The primary consumers received 2,000 kcal from producers.
- The secondary consumers received 200 kcal from primary consumers.
To calculate the efficiency of energy transfer from primary consumers to secondary consumers:
\[
\text{Efficiency} = \left( \frac{\text{Energy received by secondary consumers}}{\text{Energy received by primary consumers}} \right) \times 100
\]
Substituting the values:
\[
\text{Efficiency} = \left( \frac{200 \, \text{kcal}}{2,000 \, \text{kcal}} \right) \times 100 = 10\%
\]
This indicates that only 10% of the energy from primary consumers is passed on to secondary consumers, with most of the energy being used by primary consumers for their growth, maintenance, and other life processes.
Here's why:
- The primary consumers received 2,000 kcal from producers.
- The secondary consumers received 200 kcal from primary consumers.
To calculate the efficiency of energy transfer from primary consumers to secondary consumers:
\[
\text{Efficiency} = \left( \frac{\text{Energy received by secondary consumers}}{\text{Energy received by primary consumers}} \right) \times 100
\]
Substituting the values:
\[
\text{Efficiency} = \left( \frac{200 \, \text{kcal}}{2,000 \, \text{kcal}} \right) \times 100 = 10\%
\]
This indicates that only 10% of the energy from primary consumers is passed on to secondary consumers, with most of the energy being used by primary consumers for their growth, maintenance, and other life processes.
Answer
Which statement is true? (1 point)
Responses
Anaerobic respiration only occurs in plants and completely breaks down glucose.
Anaerobic respiration only occurs in plants and completely breaks down glucose.
Anaerobic respiration only occurs in animals and slightly breaks down glucose.
Anaerobic respiration only occurs in animals and slightly breaks down glucose.
Anaerobic respiration occurs in a few plants and all animals and slightly breaks down glucose.
Anaerobic respiration occurs in a few plants and all animals and slightly breaks down glucose.
Anaerobic respiration occurs in all plants and a few animals and completely breaks down glucose.
Responses
Anaerobic respiration only occurs in plants and completely breaks down glucose.
Anaerobic respiration only occurs in plants and completely breaks down glucose.
Anaerobic respiration only occurs in animals and slightly breaks down glucose.
Anaerobic respiration only occurs in animals and slightly breaks down glucose.
Anaerobic respiration occurs in a few plants and all animals and slightly breaks down glucose.
Anaerobic respiration occurs in a few plants and all animals and slightly breaks down glucose.
Anaerobic respiration occurs in all plants and a few animals and completely breaks down glucose.
Answered by
GPT-4o mini
None of the provided statements are accurate in their entirety, but the closest option is:
**Anaerobic respiration occurs in a few plants and all animals and slightly breaks down glucose.**
Here's why:
- **Anaerobic respiration** does occur in some plants (like yeast) and some animals (such as certain bacteria and in muscle cells during intense exercise).
- However, anaerobic respiration does not completely break down glucose; it only partially breaks it down, producing less energy compared to aerobic respiration. In animals, anaerobic respiration typically results in the production of lactate (or lactic acid), while in yeast it results in ethanol and carbon dioxide.
Thus, this option is the most correct among those listed, despite the fact that "all animals" is inaccurate since not all animals use anaerobic respiration under normal circumstances.
**Anaerobic respiration occurs in a few plants and all animals and slightly breaks down glucose.**
Here's why:
- **Anaerobic respiration** does occur in some plants (like yeast) and some animals (such as certain bacteria and in muscle cells during intense exercise).
- However, anaerobic respiration does not completely break down glucose; it only partially breaks it down, producing less energy compared to aerobic respiration. In animals, anaerobic respiration typically results in the production of lactate (or lactic acid), while in yeast it results in ethanol and carbon dioxide.
Thus, this option is the most correct among those listed, despite the fact that "all animals" is inaccurate since not all animals use anaerobic respiration under normal circumstances.
Answer
What is a term that describes a process that recycles matter in the ecosystem?(1 point)
Responses
the Krebs cycle
the Krebs cycle
the carbon cycle
the carbon cycle
photosynthesis
photosynthesis
cellular respiration
Responses
the Krebs cycle
the Krebs cycle
the carbon cycle
the carbon cycle
photosynthesis
photosynthesis
cellular respiration
Answered by
GPT-4o mini
The correct response is **the carbon cycle**.
The carbon cycle is a process that describes how carbon is recycled in the ecosystem. It involves various processes, such as photosynthesis, cellular respiration, decomposing organic matter, and the release of carbon dioxide into the atmosphere. While photosynthesis and cellular respiration are important processes in the cycle, the term that best describes the overall recycling of matter in the ecosystem is the carbon cycle.
The carbon cycle is a process that describes how carbon is recycled in the ecosystem. It involves various processes, such as photosynthesis, cellular respiration, decomposing organic matter, and the release of carbon dioxide into the atmosphere. While photosynthesis and cellular respiration are important processes in the cycle, the term that best describes the overall recycling of matter in the ecosystem is the carbon cycle.