Chapter 40

The rate at which population size grows or declines depends on the rate of________. a. births b. deaths c. immigration d. emigration c. immigration d. emigration

Suppose 200 fish are marked and released in a pond. The following week, 200 fish are caught and 100 of them have marks. How many fish are in this pond?

A population of worms is growing exponentially in a compost heap. Thirty days ago there were 400 worms and now there are \(800 .\) How many worms will there be thirty days from now, assuming conditions remain constant?

For a given species, the maximum rate of increase per individual under ideal conditions is its ________. a. biotic potential b. carrying capacity c. environmental resistance d. density control

________is a density-independent factor that influences population growth. a. Resource competition b. Infectious disease c. Predation d. Harsh weather

A life history pattern for a population is a set of adaptive traits such as________. a. longevity b. fertility c. age at reproductive maturity d. all of the above

The human population is now over 6.8 billion. It reached 6 billion in ________. a. 2007 b. 1999 c. 1802 d. 1350

Compared to the less developed countries, the highly developed ones have a higher ________. a. death rate b. birth rate c. total fertility rate d. resource consumption rate

Species that usually colonize empty habitats are more likely to show traits that are favored by ________. a. \(r\) -selection b. \(K\) -selection

Match each term with its most suitable description. ________carrying capacity ________exponential growth ________biotic potential ________limiting factor ________logistic growth a. maximum rate of increase per individual under ideal conditions b. population growth plots out as an S-shaped curve c. maximum number of individuals sustainable by the resources in a given environment d. population growth plots out as a \(J\) -shaped curve e. essential resource that restricts population growth when scarce