Biology Test ch. 4-5

To measure population density, you must divide the number of individuals living in a defined space by the

• area of the space
• birth and death rates
• carrying capacity
• height of the space

Nesting birds often space themselves evenly from other nests. This pattern is called

• clumped dispersion.
• uniform dispersion.
• random dispersion
• scatter dispersion

Which of the following will increase the size of a population?

• emigration and births
• immigration and deaths
• immigration and births
• emigration and deaths

Which of the following is a density-dependent limiting factor?

• human activities 
• unusual weather
• competition
• natural disaster

What type of growth is shown on this graph?

• logistic
• exponential
• average
• density-independent

Which of the following is a density-independent limiting factor?

• natural disaster
• predation
• disease
• parasitism

The way in which individuals of a population are spread out is called

• population density
• survivorship
• population dispersion
• logistic curve

The movement of a single caribou into a herd is an example of

• population
• immigration
• emigration
• predation

Diseases may spread more rapidly when an area is crowded, so disease is considered to be a

• type I survivorship curve
• population crasher
• density-dependent limiting factor
• population enhancer

What type of population growth is shown in the graph?  

• logistic growth
• logical growth
• exponential growth
• density-dependent growth