Consider what you know about biotic and abiotic factors in an ecosystem. What is one of the reasons that nutrients in a vegetable patch might be considered abiotic?(1 point)

Responses

Nutrients are mostly obtained from the soil.
Nutrients are mostly obtained from the soil.

Nutrient levels can change with changing ecosystems.
Nutrient levels can change with changing ecosystems.

Nutrients can come from dead plants which have decomposed.
Nutrients can come from dead plants which have decomposed.

Available nutrients affect the carrying capacity of garden plants.

11 answers

The correct response that explains why nutrients in a vegetable patch might be considered abiotic is:

Nutrients are mostly obtained from the soil.

This response emphasizes that nutrients, while essential for plant growth, are inorganic substances that primarily come from the abiotic components of the ecosystem, such as soil and minerals.

Of the following factors that impact biodiversity, which one would be considered a micro-effect?(1 point)
Responses

A hurricane destroys a coral reef.
A hurricane destroys a coral reef.

An invasive species of plant is introduced that outcompetes all local plants.
An invasive species of plant is introduced that outcompetes all local plants.

A stand of aspen trees dies and decays, leaving a clearing in the forest.
A stand of aspen trees dies and decays, leaving a clearing in the forest.

A forest is cleared for the construction of a suburban home division.

The factor that would be considered a micro-effect on biodiversity is:

A stand of aspen trees dies and decays, leaving a clearing in the forest.

This scenario represents a localized or specific change in the ecosystem (micro-effect), as it deals with a single stand of trees rather than larger-scale events like hurricanes or widespread habitat destruction.

Why does ecology need to study the biotic and abiotic elements?(1 point)
Responses

It is studying the ecosystem.
It is studying the ecosystem.

It is studying a population.
It is studying a population.

It is studying the community.
It is studying the community.

It is studying a species.

The correct response to why ecology needs to study the biotic and abiotic elements is:

It is studying the ecosystem.

Ecology focuses on understanding the interactions between living (biotic) and non-living (abiotic) components within ecosystems, as these interactions are crucial for understanding the dynamics and functioning of ecosystems as a whole.

The brown tree snake is an invasive species in the island of Guam. The brown tree snake feeds mainly on birds and other animals' eggs (birds and reptiles). The rapid increase of brown tree snakes has caused the extinction of several bird species. These birds mainly fed on insects. The brown tree snake does not have a natural predator.

Which of the following is an impact that the brown tree snake has on the ecosystem in Guam?

(1 point)
Responses

The small plant population will increase drastically.
The small plant population will increase drastically.

The insect population will increase drastically.
The insect population will increase drastically.

The population of other reptiles will increase slightly.
The population of other reptiles will increase slightly.

The fungi population will increase slightly.

The correct response regarding the impact that the brown tree snake has on the ecosystem in Guam is:

The insect population will increase drastically.

As the brown tree snake preys on birds, which feed on insects, the decline in bird populations leads to less predation on insects, allowing the insect population to grow significantly.

What is the difference between small, controlled lab experiments versus an ecosystem-scale experiment?(1 point)
Responses

the species of interest
the species of interest

the abiotic factors
the abiotic factors

the applicability of the results
the applicability of the results

the number of variables

The correct response that highlights the difference between small, controlled lab experiments and ecosystem-scale experiments is:

the applicability of the results.

Small, controlled lab experiments may provide specific insights under controlled conditions, while ecosystem-scale experiments are aimed at understanding interactions and dynamics in a more natural and complex environment, thus having broader applicability to real-world ecosystems.

What is the function of a top predator in an ecosystem?(1 point)
Responses

It creates imbalance in the ecosystem.
It creates imbalance in the ecosystem.

It maintains other populations.
It maintains other populations.

It increases the food for other predator species.
It increases the food for other predator species.

It helps increase the number of prey.

The correct response regarding the function of a top predator in an ecosystem is:

It maintains other populations.

Top predators play a crucial role in regulating the populations of herbivores and other lower trophic levels, which helps to maintain the balance and health of the ecosystem.