Vocabulary
Fill-in the Blank
5.1
5.2
5.3
100
A group of organisms of a single species that lives in a general area.
what is a population
100
prey
A predator hunts its ________
100
when an individual leaves a population
what is emigration?
100
a factor that controls population growth
What is a limiting factor?
100
Increase
Does the rate of human population increase or decrease?
200
when individuals move into a population's range.
What is immigration
200
demography
_________ is the study of populations.
200
Logistic growth
what does an "S-shape" curve represent?
200
density-dependent limiting factors
competition, predation, herbivore, disease, and stress from overcrowding are all ________________?
200
human population growth
Thomas Malthus suggested that war, famine, and disease, limit what?
300
The idea in which the larger a population gets, the faster it grows.
What is exponential growth?
300
age structure
_________ is the number of males and females of each age a population contains.
300
determines whether a population's size increases, decreases, or stays the same.
What does a population's growth rate determine?
300
Stress from overcrowding
Females can be caused to neglect/kill/eat their offspring by what?
300
death rates
Improved nutrition, sanitation, medicine, and healthcare, dramatically reduced what?
400
Occurs when a population's growth slows and then stops, following a period of exponential growth.
What is logistic growth?
400
birth rates
__________, death rates, and the age structure of a population, help predict why some countries have high growh rates while others don't.
400
A variety of factors act to stabilize it at that size.
What happens when a population reaches its carrying capacity?
400
predators
From a plant's perspective, herbivores are _________?
400
The birthrate falls to the same level as the death rate.
What happens during stage 3 of demographic transition?
500
dependent- stress from overpopulation, competition for resources, predator vs. prey, disease. independent- natural disasters, droughts, floods, hurricanes, wildfires.
Name Density-independent and Density-dependent factors.
500
death rates, birth rates
during stage two of demographic transition __________ falls while _________ stays the same.
500
Their population can grow exponentially
What can happen when an organism moves into a new environment?
500
carrying capacity
what do limiting factors determine of an environment for a species?
500
To understand population growth in different countries.
Explain one reason for why we use age- structure diagrams.
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