6.3 Population Biotic and abiotic factors

What does the term 'population' refer to in ecology?

• Different species living together

• Non-living components of an ecosystem

• Groups of organisms of the same species living in the same habitat

• All living organisms in an ecosystem

What is the definition of an ecosystem?

• A community and its abiotic environment

• Only the abiotic components of an environment

• A single species and its habitat

• Only the biotic components of an environment

What role does 'niche' play in an ecosystem?

• It describes the non-living conditions of an ecosystem

• It is the collective term for all predators in an ecosystem

• It is the role or function of an organism or species within an ecosystem

• It refers to the maximum population size an ecosystem can support

What happens when two species try to occupy the same niche?

• They form a symbiotic relationship

• Their populations become stable

• They merge into a single species over time

• One species will outcompete the other

What is meant by 'carrying capacity'?

• The total biomass an ecosystem can support

• The largest number of individuals of a population that an environment can support

• The number of species an ecosystem can support

• The maximum size of a community

Which of the following is an abiotic factor?

• Predation

• Reproduction

• Competition

• Temperature

How do abiotic factors affect the distribution of organisms?

• By changing the genetic makeup of organisms

• By influencing the reproductive rates of organisms

• By altering the habitats and conditions for survival

• By promoting mutualistic relationships

What is 'intraspecific' competition?

• A mutualistic relationship

• A type of predation

• Competition within the same species

• Competition between different species

Why are adaptations important for survival in specific habitats?

• They allow organisms to exploit different niches

• They ensure that species do not compete with each other

• They enable organisms to survive and reproduce under specific environmental conditions

• They prevent predation

Which statement best describes predator-prey relationships?

• Prey populations increase in size after an increase in predator populations

• Prey populations fluctuate in size more than predator populations

• Predator populations are usually larger than prey populations

• Predator and prey populations do not affect each other