Question
The primary source of energy in most ecosystems is/are(1 point)
Responses
heterotrophs.
heterotrophs.
autotrophs.
autotrophs.
glucose.
glucose.
the sun.
Which would be an autotroph in a grassland ecosystem?(1 point)
Responses
muskrat
muskrat
mallard duck
mallard duck
prairie cordgrass
prairie cordgrass
monarch butterfly
Which of the following best explains why there are fewer secondary consumers than producers?(1 point)
Responses
Around 10% of the energy is transferred to support the next trophic level.
Around 10% of the energy is transferred to support the next trophic level.
Secondary consumers have less cell processes that need energy.
Secondary consumers have less cell processes that need energy.
Heat energy given off from producers kills off primary and secondary consumers.
Heat energy given off from producers kills off primary and secondary consumers.
More secondary consumers can absorb radiant energy from the sun.
Which trophic level ingests the most biomass in order to receive the energy they need?(1 point)
Responses
tertiary consumers
tertiary consumers
secondary consumers
secondary consumers
producers
producers
primary consumers
Wolves were reintroduced to Yellowstone National Park in 1995. They began to hunt the abundant elk population, so elk numbers decreased. The elk carcasses provided food for other predators, like foxes, coyotes, and bears, so all of their populations increased. Elk used to overgraze on willow plants; now that willows are growing back, beaver numbers are increasing, because they prefer the slow-moving water that willows cause.
Which of these species is a keystone species?
(1 point)
Responses
wolves
wolves
willows
willows
bears
bears
elk
Responses
heterotrophs.
heterotrophs.
autotrophs.
autotrophs.
glucose.
glucose.
the sun.
Which would be an autotroph in a grassland ecosystem?(1 point)
Responses
muskrat
muskrat
mallard duck
mallard duck
prairie cordgrass
prairie cordgrass
monarch butterfly
Which of the following best explains why there are fewer secondary consumers than producers?(1 point)
Responses
Around 10% of the energy is transferred to support the next trophic level.
Around 10% of the energy is transferred to support the next trophic level.
Secondary consumers have less cell processes that need energy.
Secondary consumers have less cell processes that need energy.
Heat energy given off from producers kills off primary and secondary consumers.
Heat energy given off from producers kills off primary and secondary consumers.
More secondary consumers can absorb radiant energy from the sun.
Which trophic level ingests the most biomass in order to receive the energy they need?(1 point)
Responses
tertiary consumers
tertiary consumers
secondary consumers
secondary consumers
producers
producers
primary consumers
Wolves were reintroduced to Yellowstone National Park in 1995. They began to hunt the abundant elk population, so elk numbers decreased. The elk carcasses provided food for other predators, like foxes, coyotes, and bears, so all of their populations increased. Elk used to overgraze on willow plants; now that willows are growing back, beaver numbers are increasing, because they prefer the slow-moving water that willows cause.
Which of these species is a keystone species?
(1 point)
Responses
wolves
wolves
willows
willows
bears
bears
elk
Answers
Answered by
GPT-4o mini
1. The primary source of energy in most ecosystems is/are **the sun.**
2. Which would be an autotroph in a grassland ecosystem? **prairie cordgrass**
3. Which of the following best explains why there are fewer secondary consumers than producers? **Around 10% of the energy is transferred to support the next trophic level.**
4. Which trophic level ingests the most biomass in order to receive the energy they need? **producers**
5. Which of these species is a keystone species? **wolves**
2. Which would be an autotroph in a grassland ecosystem? **prairie cordgrass**
3. Which of the following best explains why there are fewer secondary consumers than producers? **Around 10% of the energy is transferred to support the next trophic level.**
4. Which trophic level ingests the most biomass in order to receive the energy they need? **producers**
5. Which of these species is a keystone species? **wolves**
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