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Pb Science > ECOLOGY Outcomes 4.5 - 4.9 (Test on Monday April 25, 2016) > Flashcards

ECOLOGY Outcomes 4.5 - 4.9 (Test on Monday April 25, 2016) Flashcards

1
Q

Without the Carbon Cycle, what would earth look like?

A

Without the Carbon Cycle, earth look like a frozen wasteland because it helps regulate the temperature when its on the atmosphere.

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2
Q

Where is carbon present? 4

A

It is in rocks

oceans

trapped in ice

and it’s in the atmosphere

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3
Q

If you were to take out the water out of your body, how many of your remaining body would constitute carbon?

A

half of the little pile of dust that used to be you

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4
Q

What organism is the first biological carbon reservoir?

A

plants

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5
Q

How are plants the first biological carbon reservoir? 3

A

They absorb a lot of carbon dioxide out of the atmosphere because they need it to photosynthesize.

They also release carbon dioxide in the atmosphere during their respiration process to make ATP for all their cellular functions.

Plants take in more carbon dioxide out of the atmosphere than they release.

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6
Q

What are the three possible fates of carbon absorbed by plants?

A

It can be respired back out in the atmosphere

It can be eaten by an animal

Or it can be present when the plant dies

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7
Q

Aside from plants, what is another extremely important carbon reservoir?

A

The ocean

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8
Q

How is the ocean an extremely important carbon reservoir?

A

Carbon dioxide dissolves easily in water

Once it is in there, a lot of it is used by phytoplankton for photosynthesis

They make shells

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9
Q

What are the 3 main ingredients of a fertilizer?

A

Nitrogen

Phosphorous

Potassium

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10
Q

What is the main component of proteins and DNA?

A

Nitrogen

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11
Q

What are examples of Primary Succession? 4 (series)

A

Pioneer organisms such as lichens are carried to the area by wind or birds. They can live without SOIL OR SHELTER, lichens BREAK DOWN rock and decay to form SOIL

Plants that can grow in very this soil (mosses) join the lichens. Organisms that EAT mosses move into the area.

This causes more rock to break down, more decay and therefore more soil. A wider range of organisms can move into the area

A climax community is created

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12
Q

What is it called when an ecosystem in the primary succession ends when it reached maximum productivity for the environmental conditions?

A

It is called a Climax community.

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13
Q

While fertilizer can be good for a plant, too much can BLANK or BLANK the plant.

A

kill or damage

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14
Q

What is nitrogen main component of? 2

A

Proteins

and

DNA

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15
Q

In a fertilizer, What does Phosphorous do?

A

Helps plants to flower

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16
Q

What is a monoculture in agriculture? 3

Example? What is this natural trend called?

A

Humans must then try to deter these organisms by using pesticides.

A monoculture results when a single crop is grown on a large field

Population of organisms that feed specifically on that plant increases

This natural trend is called bio diverse ecosystem

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17
Q

What is Secondary Succession? 3

A

Occurs when an Ecosystem restores itself afetr a DISTURBANCE.
(Ex: Forest fire)

Process does not have to start with bare rock. Can BUILD on the remains of an old system.

The new climax community is similar to but not exactly like the old

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18
Q

What are the 4 most common elements found in living things?

A

Nitrogen

Carbon

Hydrogen

Oxygen

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19
Q

Can organisms absorb nitrogen gas (N₂) directly?

A

no

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20
Q

What is the process called when nitrogen atoms must first be pulled out of the air and “fixed” (bonded) to other elements to form new compunds (such as ammonia) with the help of NITROGEN FIXING BACTERIA?

A

This process is called NITROGEN FIXATION

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21
Q

What is primary succession? 2

A

It involves the series of changes that begins with a BARE LANDSCAPE
(Ex: Lave covered rock)

Ends with ecosystem reaching maximum productivity for the environment conditions called a CLIMAX COMMUNITY

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22
Q

In a fertilizer, What does Potassium do?

A

It is important for the overall growth of the plant

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23
Q

How does food affect population? 2

A

The type and amount of food available in any given area affects the population that can be supported by it.

Grain feeds more people than meat

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24
Q

If there is an increase in the the type of food eaten by a particular animal, that population will BLANK

A

Increase

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25
What is an example of too much nitrogen can "burn" or kill a crop?
In the case when an animal Urinates on your lawn.
26
What do nitrifying bacteria convert Nitrogen turned ammonia to?
Nitrates
27
What type of bacteria is needed when Nitrogen atoms must first be pulled out of the air and "fixed" (bonded) to other elements to form new compunds (such as ammonia)?
Nitrogen fixing bacteria
28
In a fertilizer, What does Nitrogen do?
Helps plants turn green
29
What can nitrates be used for? 2
Nitrates can be used by plants as a source of nitrogen. They can also do this from ammonia from decomposing organisms
30
In Disturbances and Succession, what is the definition of Succession?
Is the process in which one ecosystem is gradually replaced by another.
31
What type of bacteria converts nitrogen turns ammonia into nitrate?
Nitrifying bacteria
32
How is it that grain feeds more people than meat?
Since grain is lower on the food chain, it has more energy available.
33
Can animals only obtain nitrogen from eating other organisms?
yes
34
What does Denitrifying bacteria convert nitrate to? What is the process called?
They convert it to nitrogen gas. The process is called Denitrification
35
What are important points on Disturbances and Succession?
Succession can usually changed disturbed ecosystems back into productive ones. Severe disturbances can produce irreversible changes This is especially true if soil or a species is poisoned over a large area. Severely disturbed areas can stay unproductive for hundreds or can even thousands of years. Ex: Badlands of Alberta used to be a jungle, now it is a desert
36
What is productivity? 2
Refers to the amount of plant mass produced in a particular area. Ex: Ever heard of a garden being "Productive" Affected by water, nutrients and sunlight
37
Where does photosynthesis take place in?
In the chlorophyll, which is found in the cell's chloroplasts
38
What is it called when natural trend like monoculture happen?
The natural trend is called bio diverse ecosystem
39
What do plants do from taking the sun's energy along with carbon dioxide and water? 2
to make food (carbohydrates) and oxygen
40
. | What is the equation for photosynthesis?
Energy (sunlight) + 6CO2 =====> C6 H12 O6 + 6O2
41
What is a Biological invasion?
Occurs when a species arrives in an area in which it was previously not found.
42
When organisms breakdown food (carbohydrates) during Respiration, with the help of oxygen, what does it produce?
Carbon dioxide Water And energy
43
What are Exotic species?
An organism that has invaded an ecosystem in which it did not evolve.
44
What are pesticides? 2 | eXAMPLE?
Are used to control organisms that destroy crops that are useful to humans. Accumulate, spread in increasing number or quantity in an ecosystem as the level of food chain gets higher. This called BIOMAGNIFICATION ============ eX: tHE PESTICIDE, ddt IS A GOOD EXAMPLKE OF HOW BIOMAGNIFICATION WORKS. aNIMALS THAT ARE LOWER OF THE FOOD CHAIN (PRIMARY CONSUMERS) HAVE LESS DDT IN THEM. aS YOU GET HIGHER IN THE FOOD CHAIN (SECONDARY AND TERTIARY CONSUMERS) THE DDT INCREASES
45
What is the equation for Cellular respiration?
C6 H12 O6 + 6O2 =====> 6CO2 + 6H2O + Energy
46
What are the ecological impacts of introduced species? 6
Direct predation Plant pathogens Disease transmission Disruption of food web Loss of biodiversity Extinction
47
What is the percent of earth's productivity that humans use and affect for human consumption?
20%
48
What is Cellular respiration?
It is simply photosynthesis in reverse Only Producers practice photosynthesis, but all organisms (including producers) carry out Cellular Respiration.
49
Where does cellular respiration take place in a plant cell?
in the mitochondrion
50
How can species be introduced intentionally? 4
Agriculture Biotechnology Pet trade Ornamental
51
What is photosynthesis?
Is when plants take the sun's energy along with carbon dioxide and water to make food (carbohydrates) and oxygen
52
What are the 4 factors that determine carrying capacity?
Materials and enrgy -All populations are limited by the supply of essential materials(carbon, water, etc) and the amount of usable energy from the sun. Food chains -The population size at any trophic level below it (What it eats) nad the trophic level above it. (what east it) Competitions for food =inter-specific-Competition between different species. (food, territory) =intraspecific-Competition of members of the same species. (food, mate, territory). Population density Different organisms require different amounts of space based on size, environment and way of life.
53
What are some things that might limit how many individuals of an organism can live in one location? 6
Food scarcity Territorial dispute Mating season doesn't last long Soliditary mindset They can be easy targets for parasites and hunters Prey moves a lot
54
What is the dramatic effect on other species about the percent we use and affect of earth productivity? What about us?
It gives them less space and resources for all other species It had led to an alarming HUMAN GROWTH RATE (this trend can't continue much longer)
55
How can species be introduced accidentally? 3
Ship ballast Air travel Escape from agriculture
56
What is the definition of populations? 2
The number of individuals of a species that live in a defined area In nature, the population of any species in an environment will reach a maximum. It is called the CARRYING CAPACITY
57
How can introduced species be controlled? 3 with one that has 4 examples
Inspections at travel centres Ballast regulations ``` Control of established exotics =Shooting and trapping =mechanical removal (plants) =pesticides =biological control ```
58
What is happening in Region A in a population growth curve?
Slow rate of reproduction Only a small number of organisms are sexually mature and able to reproduce The organisms may be adjusting to a new environment
59
What is happening in Region C in a population growth curve?
The carrying capacity has been reached Population growth becomes constant The number of deaths equals the number of births
60
What is happening in Region B in a population growth curve?
Many organisms have reached sexual maturity and are reproducing The organisms have adjusted to their environment They have ample food and water

Pb Science (10 decks)

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