Bio Test 3

Question 1

3 key features of population

Answer 1

Size

Density

Dispersion

Question 2

Sustainable vs unsustainable ecological footprints

Answer 2

Sustainable no long term damage in the ecosystem vs unsustainable long term damage in the ecosystem

Question 3

Limiting factor

Answer 3

A factor that limits the growth population in an ecosystem

Ex build up of waste

Question 4

What is a niche

Answer 4

The way an organism occupies a position in an ecosystem

Question 5

What is competition

Answer 5

Both organisms want the same thing

Question 6

What is predation

Answer 6

Interaction in which one organism captures and feeds on another organisms

Question 7

Parasitism

Answer 7

The relationship harms one of the members

Question 8

Commensalism

Answer 8

One member of the relationship benefits but the other is neither helped or harmed

Question 9

Mutualism

Answer 9

Both organisms benefit

Question 10

Exponential growth vs logistic growth

Answer 10

Exponential growth: produces a J shaped curve when population is against time

Logistic growth: occurs when growth rate decreases as the population reaches carrying capacity S shape

Question 11

What is immigration

Answer 11

Coming to live permanently in a foreign country

Question 12

What is a density dependent factor

Answer 12

Biotic factors that depend on the density of the population ( ex: disease, competition, and parasites )

Question 13

Three types of dispersion

Answer 13

Clumped

Uniform

Random

Question 14

Three types of symbiosis

Answer 14

Mutualism

Commensalism

Parasitism

Question 15

What is sustainability

Answer 15

natural resources in order to maintain an ecological balance

Question 16

What is our present doubling time

Answer 16

60 Years

Question 17

What are ecosystems services

Answer 17

Cycling of nutrients

Pollination of crops

Balance of growth/ decomposition

Contribution of beauty

Question 18

What is a watershed

Answer 18

Area of land over which drains into a body of water

Question 19

What is erosion

Answer 19

Rock and soil are loosened from earths surface at one location and moved to another

Question 20

What is cross pollination and what does it account for with regards to food production

Answer 20

When pollen is transferred from one flower to a different flower. And it contributes to 1/3 of the world food production

Ex wind, bees

Question 21

What is overexploitation

Answer 21

Using a resource faster than it can be replaced which leads to extinction

Ex cod fishing was closed because the population was low due to overexploitation

Question 22

What is a keystone species

Answer 22

A species on which other species in an ecosystem largely depend

Question 23

What is a ecosystem engineer

Answer 23

A species that causes huge changes to landscapes which creates a new ecosystem

Ex beavers

Question 24

What is a succession

Answer 24

The process of ecosystems changing from a simple to a more complex structure

Question 25

Bottom up - top down population regulations

Answer 25

Top down is when the predators and preys are the same then the preys decreases due to the predators Bottom up is when the predators get low due to no food and the preys grow up

Question 26

What is habitat change and how does it affect the environment

Answer 26

The process by which humans alter a habitat enough so that the native species can no longer live there It declines the population of many species

Question 27

Benefits of a natural ecosystem

Answer 27

``` Cultural Products Environmental Economic Other ```

Question 28

Cultural

Answer 28

Recreation Education Spirituality

Question 29

Products

Answer 29

Lumber Food Medicine

Question 30

Environmental

Answer 30

Climate Water and air purification

Question 31

Economic

Answer 31

Jobs Exports

Question 32

Other

Answer 32

Flood prevention Erosion reduction

Question 33

Environmental benefits

Answer 33

Producing oxygen Moderating climates Filtering pollutants Forestry Ecotourism

Question 34

List the five major causes that lead to the decrease in biodiversity

Answer 34

``` Habitat change Overexploitation Pollination Invasive species Climate change ```

Question 35

What is a invasive species

Answer 35

Quagga mussels and zebra mussels

Question 36

Factors that affect future population growth

Answer 36

Biotic factors Abiotic factors Birth rate Death rate