Biosphere Review

What is an ecosystem?

• An ecosystem is a community of living organisms interacting with their environment.

• An ecosystem is all living and nonliving things in an environment and the many ways they interact.

• An ecosystem is a group of similar species living in the same area.

• An ecosystem is a system of energy flow and nutrient cycling in a specific area.

What is the difference between a population and a community?

• A population consists of individuals of the same species, while a community includes multiple species.

• A population includes multiple species, while a community consists of individuals of the same species.

• A population is a group of organisms in a specific area, while a community is a group of organisms in a specific ecosystem.

• A population refers to the total number of organisms, while a community refers to the interactions between different species.

What are the characteristics of tundra?

• Tundra is characterized by permafrost, cold temperatures, and little precipitation.

• Tundra is known for its warm climate and high rainfall.

• Tundra features dense forests and diverse wildlife.

• Tundra has a tropical climate with frequent storms.

What does the exponential graph represent in population studies?

• The exponential graph shows population size increasing quickly.

• The exponential graph indicates a stable population size.

• The exponential graph represents a declining population.

• The exponential graph illustrates random population fluctuations.

What does carrying capacity mean?

• The maximum number of individuals an area can support without environmental degradation.

• The total number of species that can coexist in an ecosystem.

• The amount of resources available in a given area.

• The rate at which a population can grow under ideal conditions.

What factors can lead to sparse population in an area?

• Lack of natural resources

• High population density

• Abundant agricultural land

• Mild climate conditions

How do human activities affect ecosystems?

• They have no impact on ecosystems.

• They can lead to habitat destruction and loss of biodiversity.

• They improve biodiversity and ecosystem health.

• They only affect urban areas.

What is the role of producers in an ecosystem?

• Producers convert sunlight into energy through photosynthesis, forming the base of the food chain.

• Producers are organisms that consume other organisms for energy.

• Producers are responsible for decomposing organic matter in the ecosystem.

• Producers regulate the population of consumers in the ecosystem.

What is the significance of keystone species?

• They are the most abundant species in an ecosystem.

• They have a disproportionately large impact on their environment relative to their abundance.

• They are always the largest species in their habitat.

• They are species that are at the top of the food chain.

What is the water cycle?

• The process of water moving through the Earth and atmosphere, including evaporation and precipitation.

• A method of purifying water using chemical reactions.

• The cycle of water used in irrigation systems for agriculture.

• A phenomenon that only occurs in tropical regions.