Grade 12 IEB Population Ecology
answered questions correct!!
Ecology - answer ✅✅The study of the interactions of
organisms with their physical and biological
environments.
Population ecology - answer ✅✅The fluctuations in the
size of a population and the factors (physical and social)
that regulates these fluctuations.
Population size - answer ✅✅The total number of
individuals
Natality - answer ✅✅birth rate
Mortality - answer ✅✅death rate
Immigration - answer ✅✅Individuals moving into a
population and staying
, Emigration - answer ✅✅Individuals leaving a population
and not returning
Closed population - answer ✅✅a population that has
no immigration and emigration with other populations
Environmental resistance - answer ✅✅The total number
of factors that stop a population from reproducing at its
maximum rate. Limiting factors build up this.
carrying capacity - answer ✅✅The population density
that the environment can support. The pop fluctuates
around the carrying capacity.
Limiting factors - answer ✅✅Help to regulate the growth
of a population.
Density independent factors - answer ✅✅Limit growth
pop. Results natural factors, not bcuz of no. of organisms.
PHYSICAL FACTORS (temp, humidity, rainfall)
CATASTROPHIC EVENTS (flood, fire, earthquake)
Density dependent factors - answer ✅✅Greater effect
pop density is high. More crowded: COMPETE (resources-
food,water,light,oxygen,space,shelter) PREDATORS (more
easily found) DISEASE (spread easily)
answered questions correct!!
Ecology - answer ✅✅The study of the interactions of
organisms with their physical and biological
environments.
Population ecology - answer ✅✅The fluctuations in the
size of a population and the factors (physical and social)
that regulates these fluctuations.
Population size - answer ✅✅The total number of
individuals
Natality - answer ✅✅birth rate
Mortality - answer ✅✅death rate
Immigration - answer ✅✅Individuals moving into a
population and staying
, Emigration - answer ✅✅Individuals leaving a population
and not returning
Closed population - answer ✅✅a population that has
no immigration and emigration with other populations
Environmental resistance - answer ✅✅The total number
of factors that stop a population from reproducing at its
maximum rate. Limiting factors build up this.
carrying capacity - answer ✅✅The population density
that the environment can support. The pop fluctuates
around the carrying capacity.
Limiting factors - answer ✅✅Help to regulate the growth
of a population.
Density independent factors - answer ✅✅Limit growth
pop. Results natural factors, not bcuz of no. of organisms.
PHYSICAL FACTORS (temp, humidity, rainfall)
CATASTROPHIC EVENTS (flood, fire, earthquake)
Density dependent factors - answer ✅✅Greater effect
pop density is high. More crowded: COMPETE (resources-
food,water,light,oxygen,space,shelter) PREDATORS (more
easily found) DISEASE (spread easily)
