Understanding Population

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?

• predation

• parasitism

• mutualism

• interference competition

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

• population structure

• population size

• population density

• population growth

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

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

• If a population is less than the carrying capacity, it leads to a negative growth rate.

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

• If a population is more than the carrying capacity, it leads to a neutral growth rate

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?

• one direction only

• seasonal movement

• daily movement

• one return journey

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?

• apparent competition

• interference competition

• exploitation competition

• mutualism

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How does dispersal help different species?

Dispersal helps different species to increase their range of places, thereby helping to increase their population _____ in different regions.

• size

• life

• health

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How does dispersal help different species?

Dispersal also helps to avoid ____________

of a single location as species move to different locations.

• growth

• crowding

• spread of diseases

What refers to the sequence of events in an organism’s life?

A _______________

refers to the sequence of events in an organism’s life from birth to death.

.

• survivorship curve

• life table

• life history

Which growth model is a realistic representation of population growth?

A realistic representation of population growth is the ___________ growth model.

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Select the type of migration or dispersal to the image of the species that follows it.

• daily movement

• passive dispersal

• one return journey

• one direction only