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Introduction to Ecology quiz #2

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  • What is a climax community?
    A climax community is a stable and mature ecological community with little change in the composition of species, typically the final stage of ecological succession.
  • What is the role of a pioneer species in primary succession?
    Pioneer species are the first organisms to colonize a barren environment, initiating an ecological succession by creating conditions favorable for other species.
  • What is a pioneer species?
    A pioneer species is an organism that is the first to colonize a previously disrupted or damaged ecosystem, beginning a chain of ecological succession.
  • What is an example of a cultural ecosystem service provided by forests?
    Recreation and tourism
  • What is the difference between a food chain and a food web?
    A food chain is a linear sequence of organisms where nutrients and energy pass as one organism eats another, while a food web is a complex network of interconnected food chains in an ecosystem.
  • How do the biotic and abiotic limiting factors of an ecosystem determine its carrying capacity?
    Biotic factors like food availability and predation, and abiotic factors like water and climate, limit the number of organisms an ecosystem can support, determining its carrying capacity.
  • Why does secondary succession occur faster than primary succession?
    Secondary succession occurs faster because it begins in areas where soil is already present, unlike primary succession which starts on bare rock or sand.
  • What best describes a pioneer species in an ecosystem?
    A species that modifies the environment to make it more habitable for other species
  • Which ecosystem service is categorized as a regulating service?
    Climate regulation
  • Which term refers to all areas of Earth where life exists? A) Biosphere B) Biome C) Community D) Ecosystem
    A) Biosphere
  • What is the role of producers in an ecosystem?
    Producers, such as plants and algae, convert solar energy into chemical energy through photosynthesis, forming the base of the food chain.
  • Which factor is least influential in affecting the biodiversity of wetlands?
    Air temperature
  • Which best describes the relationship between two species and a niche?
    A niche is the role or function of a species within an ecosystem, including its use of resources and relationships with other species.
  • Which is a biotic factor? A) Temperature B) Water C) Soil D) Plants
    D) Plants
  • What is a possible consequence of ozone layer depletion on living organisms?
    Increased UV radiation exposure
  • What do pioneer species do?
    Pioneer species initiate ecological succession by colonizing barren environments and modifying them to support subsequent communities.
  • Which disturbance would result in primary succession? A) Forest fire B) Flood C) Volcanic eruption D) Hurricane
    C) Volcanic eruption
  • What term includes all the biotic and abiotic factors in an area?
    Ecosystem
  • How are food webs used to help explain ecosystem interactions?
    Food webs illustrate the complex network of feeding relationships and energy flow between organisms in an ecosystem.
  • Which question is most relevant to an ecosystem beginning primary succession? A) What species are present? B) How does soil form? C) What is the climate like? D) How do animals migrate?
    B) How does soil form?
  • What is the difference between a habitat and a niche?
    A habitat is the physical environment where an organism lives, while a niche is the role the organism plays in that environment.
  • What is an example of a pioneer species?
    Lichen
  • What are two types of pioneer species?
    Lichens and mosses are common types of pioneer species.
  • Which statement best describes the distribution of life in the lake?
    Life in a lake is distributed based on factors like light availability, temperature, and nutrient levels, creating distinct zones.
  • What natural and human cause of succession can be both?
    Flooding
  • In a healthy ecosystem, what is the role of decomposers?
    Decomposers break down dead organic material, recycling nutrients back into the ecosystem.
  • How are primary consumers different from secondary consumers?
    Primary consumers eat producers (plants), while secondary consumers eat primary consumers (herbivores).
  • What are the components of the biosphere?
    All of the above
  • What are examples of pioneer species?
    Lichens
  • What do decomposers do?
    Decomposers break down dead organisms and waste, returning nutrients to the soil.
  • What do lichens do in primary succession?
    Lichens break down rock to form soil, allowing other plants to grow and further succession.
  • What is an example of a biotic factor in an ecosystem?
    Bacteria
  • What is the main function of decomposers in a food web?
    Decomposers recycle nutrients by breaking down dead organisms and waste products.
  • What is a producer’s job in an ecosystem?
    Producers convert solar energy into chemical energy through photosynthesis, forming the base of the food chain.
  • Which of these organisms is the pioneer species of primary succession? A) Grass B) Lichen C) Shrub D) Tree
    B) Lichen
  • Which is an example of vehicle disease transmission?
    Vehicle disease transmission occurs when a disease is spread through a medium like water or air, such as cholera through contaminated water.
  • What is the role of decomposers?
    Decomposers break down dead organic material, recycling nutrients back into the ecosystem.
  • What biotic and abiotic factors can you find in this marine ecosystem?
    Biotic factors include fish and algae, while abiotic factors include water temperature and salinity.