Understanding Populations Mastery Test Review

Which statement is true about the relationship between carrying capacity and population size?

If a population is less than the carrying capacity, it leads to a positive growth rate and increased population.

What shape of a curve does an exponential growth curve have?

J- Curve

Describe the logistic growth model?

Population growth decreases as resources become limited. When a population size reaches the carrying capacity of its environment, the population growth slows down or stops completely

Describe the logistic growth model?

There are three different phases of the S-shaped curve. At first, growth is exponential because individuals are few and resources are plenty

What type of migration does a snail have?

daily movement

Two grizzly bears are fighting over a fish to feed themselves. What kind of interaction is this scenario, which works as a limiting factor in the bears' survival?

exploitation competition

How does dispersal help different species?

increase their population size and avoid over crowding

What refers to the sequence of events in an organism's life (from birth to death)?

life history

Which growth model is a realistic representation of population growth?

logistic

What type of migration do butterflies have?

one direction only

What type of migration does salmon have?

one return journey

Joshua needs to clean his dog every week to remove the ticks from the dog's body. What kind of interaction do Joshua's dog and the ticks have?

parasitism

What type of migration does a dandelion have?

passive dispersal

Anna is working on finding the patterns of demographic variation within North America's populations. What is Anna working on?

population structure

A herd of sheep moves up the mountain to graze during summer, and migrates to the valley during winter. What type of migration do the sheep follow?

seasonal movement