Ecology Of Populations 2

Question 1

Which term describes the maximum population size an environment can sustain indefinitely given available resources?

Accepted Answer

Carrying capacity

Answer

Biotic potential

Answer

Population density

Answer

Replacement rate

Question 2

A population grows from 200 to 260 individuals in one year. What is the per capita growth rate (r) for that year?

Accepted Answer

0.30

Answer

0.23

Answer

0.60

Answer

0.13

Question 3

In a survivorship curve, a Type I curve is characteristic of species that:

Accepted Answer

Have low juvenile mortality and high adult mortality

Answer

Produce many offspring with little parental care

Answer

Experience constant mortality at all ages

Answer

Die mostly as juveniles before reaching adulthood

Question 4

Which of the following is an example of a density-independent limiting factor for a population?

Accepted Answer

A sudden wildfire destroying habitat

Answer

Food competition among individuals

Answer

Predation pressure that increases with density

Answer

Disease spread facilitated by crowding

Question 5

What does the demographic concept of 'generation time' refer to?

Accepted Answer

The average time between birth and first reproduction

Answer

The average age at which individuals die

Answer

The total reproductive lifespan of an individual

Answer

The interval between population censuses

Question 6

Which population age structure indicates a rapidly growing population?

Accepted Answer

A broad base tapering to a narrow top

Answer

A narrow base with a wide top pyramid

Answer

An even distribution across all age classes

Answer

A narrow base and narrow top with a wide middle

Question 7

The Allee effect describes a phenomenon where:

Accepted Answer

Per capita growth rate decreases at very low population densities

Answer

Population growth accelerates as density increases

Answer

Carrying capacity rises when predators are removed

Answer

Emigration rate exceeds immigration at high densities