Population Flash Cards

Question 1

Describe and graph exponential population growth

Answer 1

• “J” curve
• Slow initial growth and then a rapid population explosion after
• occurs when there are no limits to population size

Use link for image…http://www.starsandseas.com/SAS%20Ecology/SAS%20population/ecopop_grwth.htm

Question 2

What are some factors affecting population size? What are they called?

Answer 2

LIMITING FACTORS:

• Humans
• Weather
• Space (area)
• Habitat (shelter)
• Food
• Water
• Predators
• Disease

Question 3

LINEAR POPULATION GROWTH

Define…

• Linear
• Population
• Growth

Answer 3

Linear: in the form of a line
Population: the amount of organisms in an area
Growth: increasing in numbers

Question 4

Describe and graph linear population growth

Answer 4

• Normal line shape
• Steady rate of growth that is consistent over the generations

Use link for image…http://www.starsandseas.com/SAS%20Ecology/SAS%20population/ecopop_grwth.htm

Question 5

What is the x axis labeled as on population graphs? The y axis?

Answer 5

x axis: time

y axis: population size

Question 6

EXPONENTIAL POPULATION GROWTH

Define…
-Exponential

Answer 6

Exponential: keeps doubling; the bigger it gets, the faster it grows

Question 7

PREDATOR-PREY RELATIONSHIPS

Define…

• Predator
• Prey

Answer 7

Predator: something that eats/hunts for food
Prey: the thing that is eaten or hunted

Question 8

Describe and graph predator-prey relationships

Answer 8

• When predators are HIGH, prey is low because they ate prey that reproduces
• Typically, both are NOT high/low at the same time
• They are OPPOSITES: when one is high, the other is low and when one is low the other is high

Use link for image… http://www.tiem.utk.edu/~gross/bioed/bealsmodules/predator-prey.html

Question 9

Carrying capacity

Answer 9

The number of organisms that can be supported by an area (how many things can live somewhere and have their needs met)

Question 10

Exponential growth to carrying capacity

Answer 10

The doubling of a population until it reaches the total number that can survive in the area

Question 11

Describe and graph exponential growth to carrying capacity

Answer 11

-The population growth becomes steady at the capacity that can survive (the number if organisms stays the same now)

Use second image…http://www.dummies.com/how-to/content/the-environmental-science-of-population-growth-mod.html

Question 12

Exponential growth to carrying capacity with population crash

-Graph

Answer 12

The doubling of a population (exponential growth) until it reaches the total number that can survive in the area (carrying capacity) followed by a dramatic drop in population size (population crash) that occurs when a population exceeds its carrying capacity

-Use this image except add dramatic population drop at the end of the graph…https://biologyeoc.wikispaces.com/CarryingCapacity

Question 13

Biological accumulation

Answer 13

The accumulation of toxins in the tissues of living organisms that moves on from one organism to another when it is eaten. The harmful substances never disappear, unlike energy, and either build up in an organism with no effect, make the organism sick, or kill it.