yo bot The Florissant Fossil Beds in Colorado are home to several massive redwood stumps that were subjected to a special kind of fossilization millions of years ago. What service could these fossilized stumps most likely provide?(1 point)
Responses
lumber
lumber
soil creation
soil creation
tourism
tourism
shelter
11 answers
tourism
Marine biologist Dr. James Estes researched sea otters and their habitats in the Aleutian Islands of the North Pacific Ocean. Sea otters feed on animals such as crabs and urchins. Islands with sea otters contained a lot of kelp, a seaweed that is an important food source for fish and other sea animals. However, Islands without otters had large populations of urchins but no kelp since sea urchins feed on this seaweed. Since sea otters are able to control the population of urchins, this allows for kelp to freely grow in those areas. Given this information, what term best describes the otter in the Aleutian Islands ecosystem?(1 point)
Responses
decomposer
decomposer
keystone species
keystone species
apex predator
apex predator
producer
Responses
decomposer
decomposer
keystone species
keystone species
apex predator
apex predator
producer
keystone species
Your friend John is having trouble with his compost bin. The material in his compost pile doesn’t seem to be decomposing well. You take a sample of the pile and check for the presence of microorganisms under the microscope. You see that there are indeed microorganisms; however, they don’t appear to be growing very fast. John says that he regularly mixes his compost pile to expose it to oxygen but has noticed the pile feels cold. What is the most likely explanation for this problem?(1 point)
Responses
The compost pile was sufficiently moist.
The compost pile was sufficiently moist.
The compost pile contained incorrect amounts of "greens" and "browns".
The compost pile contained incorrect amounts of "greens" and "browns".
The compost pile was placed in the sunshine.
The compost pile was placed in the sunshine.
The compost pile contained aerobic bacteria.
Responses
The compost pile was sufficiently moist.
The compost pile was sufficiently moist.
The compost pile contained incorrect amounts of "greens" and "browns".
The compost pile contained incorrect amounts of "greens" and "browns".
The compost pile was placed in the sunshine.
The compost pile was placed in the sunshine.
The compost pile contained aerobic bacteria.
The compost pile contained incorrect amounts of "greens" and "browns".
“Green” material has high amounts of (1 point)
Responses
phosphorus.
phosphorus.
magnesium.
magnesium.
carbon.
carbon.
nitrogen.
Responses
phosphorus.
phosphorus.
magnesium.
magnesium.
carbon.
carbon.
nitrogen.
nitrogen.
Some students decide to plant their own garden. They want to eat a more plant-based diet. For meat, they will buy locally from a butcher. Any remaining plant-based scraps will be composted and used as fertilizer for their garden.
Which part of this plan represents recycling to reduce their waste?
(1 point)
Responses
composting scraps
composting scraps
planting a garden
planting a garden
eating a plant-based diet
eating a plant-based diet
buying locally
Which part of this plan represents recycling to reduce their waste?
(1 point)
Responses
composting scraps
composting scraps
planting a garden
planting a garden
eating a plant-based diet
eating a plant-based diet
buying locally
composting scraps
Plants, bison, elk, and wolves are all members of an ecosystem. The bison and elk are both primary consumers in this ecosystem, while the wolves are a predator. Over time, the bison completely disappear. Give an example of how the ecosystem may respond to this change, and explain how this relates to both resiliency and biodiversity. (4 points)
Example of ecosystem response: With the disappearance of the bison, the population of elk increases rapidly. The elk overgraze the vegetation, leading to a decline in the availability of food for other herbivores in the ecosystem. This can result in a decrease in plant diversity, as certain plant species are over-consumed by the elk.
Relation to resiliency: The ecosystem's resiliency is compromised when the bison disappear. A diverse ecosystem with multiple species of primary consumers (such as bison and elk) is more resilient to changes compared to an ecosystem with fewer species. This is because a diverse ecosystem can better withstand disturbances or shifts in populations, ensuring the ecosystem's functionality and stability.
Relation to biodiversity: The disappearance of the bison impacts the biodiversity of the ecosystem. Biodiversity refers to the variety of species within an ecosystem. With the loss of the bison, the overall biodiversity of the ecosystem decreases. This can have cascading effects on the entire ecosystem, affecting various interactions between species and disrupting the balance that contributes to a healthy, functioning ecosystem.
Relation to resiliency: The ecosystem's resiliency is compromised when the bison disappear. A diverse ecosystem with multiple species of primary consumers (such as bison and elk) is more resilient to changes compared to an ecosystem with fewer species. This is because a diverse ecosystem can better withstand disturbances or shifts in populations, ensuring the ecosystem's functionality and stability.
Relation to biodiversity: The disappearance of the bison impacts the biodiversity of the ecosystem. Biodiversity refers to the variety of species within an ecosystem. With the loss of the bison, the overall biodiversity of the ecosystem decreases. This can have cascading effects on the entire ecosystem, affecting various interactions between species and disrupting the balance that contributes to a healthy, functioning ecosystem.