Population size, density, & dispersal khan article

What is a population in ecology?

• All the organisms of a given species living in a particular area

• The number of people living in a city

• A group of different species living together

• The total number of animals in the world

What is demography?

• The study of plant growth

• The study of animal behavior

• The statistical study of populations and how they change over time

• The study of human history

Select all of the following organisms that the quadrant method could be practically used on:

• coral on a reef

• grass in a field

• mice in a field

• fish on a reef

• Hawks in the sky

Which method is used to estimate the population size of organisms that are capable of moving around (such as animals)?

• Counting all individuals

• Mark-recapture method

• Satellite tracking

• Quadrat method

What does 'clumped dispersion' mean?

• Individuals are evenly spaced

• Individuals are randomly spaced

• Individuals are clustered in groups

• Individuals are spread out evenly

Why might larger populations be more stable?

• They have more food

• They have greater genetic variability

• They are less likely to be hunted

• They have more space