#106 Classwork: Studying Populations

The method of counting ALL of the members of a population is called

• sample

• mark and recapture studies

• direct observation

• indirect observation

a scientist may look at the “signs” of an organism to determine population size

• sample

• mark and recapture studies

• direct observation

• indirect observation

count the number of organisms in a small area and then multiply to find the number of organisms in the larger area

• sample

• mark and recapture studies

• direct observation

• indirect observation

scientists capture a sample of the population, tag, and release them. At a later time, they capture a sample of the population again and count how many are tagged from before and how many are new individuals.

• sample

• mark and recapture studies

• direct observation

• indirect observation

The __________________ of a population is the number of organisms born over a specific time

• birth rate

• death rate

The ______________________ of a population is the number of organisms that die over a specific time.

• birth rate

• death rate

when organisms move into a population

• limiting factor

• immigration

• emigration

• population density

• carrying capacity

when organisms move out of a population

• limiting factor

• immigration

• emigration

• population density

• carrying capacity

the number of individuals in an area of specific size

• limiting factor

• immigration

• emigration

• population density

• carrying capacity

an environmental condition or resource that limits the size of a population of organisms

• limiting factor

• immigration

• emigration

• population density

• carrying capacity