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Science > Bio Test 3 > Flashcards

Bio Test 3 Flashcards

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Biology 101 flashcards
1
Q

3 key features of population

A

Size

Density

Dispersion

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2
Q

Sustainable vs unsustainable ecological footprints

A

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

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3
Q

Limiting factor

A

A factor that limits the growth population in an ecosystem

Ex build up of waste

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4
Q

What is a niche

A

The way an organism occupies a position in an ecosystem

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5
Q

What is competition

A

Both organisms want the same thing

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6
Q

What is predation

A

Interaction in which one organism captures and feeds on another organisms

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7
Q

Parasitism

A

The relationship harms one of the members

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8
Q

Commensalism

A

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

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9
Q

Mutualism

A

Both organisms benefit

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10
Q

Exponential growth vs logistic growth

A

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

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11
Q

What is immigration

A

Coming to live permanently in a foreign country

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12
Q

What is a density dependent factor

A

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

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13
Q

Three types of dispersion

A

Clumped

Uniform

Random

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14
Q

Three types of symbiosis

A

Mutualism

Commensalism

Parasitism

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15
Q

What is sustainability

A

natural resources in order to maintain an ecological balance

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16
Q

What is our present doubling time

A

60 Years

17
Q

What are ecosystems services

A

Cycling of nutrients

Pollination of crops

Balance of growth/ decomposition

Contribution of beauty

18
Q

What is a watershed

A

Area of land over which drains into a body of water

19
Q

What is erosion

A

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

20
Q

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

A

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

21
Q

What is overexploitation

A

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

22
Q

What is a keystone species

A

A species on which other species in an ecosystem largely depend

23
Q

What is a ecosystem engineer

A

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

Ex beavers

24
Q

What is a succession

A

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

25
Q

Bottom up - top down population regulations

A

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

26
Q

What is habitat change and how does it affect the environment

A

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

27
Q

Benefits of a natural ecosystem

A 
Cultural 
Products
Environmental 
Economic
Other
28
Q

Cultural

A

Recreation

Education

Spirituality

29
Q

Products

A

Lumber

Food

Medicine

30
Q

Environmental

A

Climate

Water and air purification

31
Q

Economic

A

Jobs

Exports

32
Q

Other

A

Flood prevention

Erosion reduction

33
Q

Environmental benefits

A

Producing oxygen

Moderating climates

Filtering pollutants

Forestry

Ecotourism

34
Q

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

A 
Habitat change
Overexploitation 
Pollination 
Invasive species 
Climate change
35
Q

What is a invasive species

A

Quagga mussels and zebra mussels

36
Q

Factors that affect future population growth

A

Biotic factors

Abiotic factors

Birth rate

Death rate

Science (12 decks)

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