24.1 populations

What does population size refer to?

• The number of organisms existing in a particular area

• The size of an organism in a given area

• The total area an ecosystem covers

• The number of ecosystems in a particular area

What can the term 'population' be used to describe?

• Number of bacteria or microorganisms in a bioreactor

• The age distribution of organisms in an ecosystem

• The migration patterns of animals

• The water cycle within a habitat

What is the first phase of the population growth curve called?

• Slow growth region

• Stable state

• Rapid growth region

• Death phase

What factors can affect a population size?

• Birth rate and death rate

• The name of the species

• The type of music played in the area

• Color of the organisms

What are limiting factors?

• Environmental impacts that stop growth

• Factors that increase population size indefinitely

• The maximum size of an organism

• The birth rate in a population

What are biotic factors?

• The physical characteristics of the habitat

• The chemical composition of the soil

• Living components that affect the ecosystem

• Nonliving environmental factors

What does carrying capacity refer to?

• The total area an ecosystem can cover

• The maximum height trees can grow in a forest

• The ability of an ecosystem to transport nutrients

• The maximum population size an environment can support

What is immigration in the context of migration?

• Organisms moving out of a habitat

• Organisms moving into a new habitat

• The process of becoming immune to diseases

• The seasonal movement of birds

What are density independent factors?

• The weight of the organisms in a population

• Factors that depend on the population size

• Factors that change population size regardless of its size

• The density of organisms in a given area

What is the stable state in the population growth curve?

• When the population size decreases rapidly

• When the population size increases exponentially

• When the number of organisms fluctuates within a range

• When the population size reaches zero