Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Biology > Organising an ecosystem > Flashcards

Organising an ecosystem Flashcards

1
Q

What is the order in a food chain

A

Producer
Primary consumers - herbivores
Secondary consumers - carnivores
Tertiary consumers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is a producer

A

Organism that makes its own food usually by photosynthesis

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is a food chain

A

Representation of the feeding relationships within a community

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is a consumer

A

Organism that eats other organism for food

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is a herbivore

A

Organism that only eats producers (plants/algae)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is a predator

A

Organism that kills and eats other organisms

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is a prey organism

A

Organism that is killed and eaten by another organism

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is an apex predator

A

Carnivore with no predators

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the tropic levels of an organism

A

The number of steps it is from the start of its food chain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What does the pyramid of biomass represent

A

Relative amount of biomass at each tropic level of a food chain

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What proportion of biomass is transferred from each tropic level to the one above

A

Approx 10%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Why is biomass lost between tropic levels

A

Respiration

Not all matter eaten is digested some is removed as waste products

Some absorbed materials is lost as waste

Energy is used in moment

Energy is used to keep animals warm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What is the carbon cycle

A

Process that returns carbon from organisms to the atmosphere as carbon dioxide which can then be used by plants

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Explain processes that release carbon dioxide into the atmosphere

A

Factories burning fossil fuels

Decay and decomposition of microorganisms as they respire

Respiration in humans and animals

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Explain processes that remove carbon dioxide from the atmosphere

A

Dissolved into water and oceans

Photosynthesis in green plants

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What is the water cycle

A

Process that provides fresh water for plants and animals on land before draining into seas and rivers

17
Q

What is condensation

A

As moist air rises it cools. Water vapour condenses back into liquid water droplets producing clouds

18
Q

What is precipitation

A

As water droplets in clouds get heavier they fall as rain, snow and hail

19
Q

What is evaporation

A

Water turning from a liquid to a gas when heated

20
Q

What is a transpiration

A

Water movement through a plant and it’s evaporation from the leaves of stem

21
Q

What is percolation in the water cycle?

A

Water trickling through gaps in soils and rocks

22
Q

What is a decomposer

A

Organism that breaks down dead plant and animal matter

23
Q

What are two examples of a decomposer?

A

Fungi
Bacteria

24
Q

What is the role of decomposition

A

Returns carbon to the atmosphere and mineral ions to the soil from dead matter

25
Q

What factors affect the rate of decay by decomposers

A

Oxygen levels
Moisture levels
Temperature
pH

26
Q

What can compost produced from decay be used for

A

Fertilised for growing garden plants or crops

27
Q

What type of decomposition happens when there is a lack of oxygen

A

Anaerobic decomposition

28
Q

What gas does anaerobic decay release and how can this gas be used for

A

Methane

Used as a fuel

29
Q

What environmental factors affect the distribution of a species in ecosystems

A

Temperature - warming temps lead to migration

Availability of water - during droughts animals have to move away

Composition of atmospheric gases -

30
Q

Describe the methods for the decay practical

A

5cm cubed of milk and 7 cm cubed of sodium carbonate in test tube

Add indicator phenolphthalein which will turn pink - alkali

5 cm cubed of lipase in test tube

Place both test tubes in water bath with thermometer start at 20 degrees

Use pipette to transfer 1cm cubed of lipase into milk solution

Start timer

When solution returns white stop timer - solution is now acidic

31
Q

Why does the milk solution become acidic after lipase is added in the decay practical

A

Lipase enzyme breaks down fat molecules into fatty acids and glycerol

Fatty acids turn solution acidic

32
Q

What is the independent variable

A

What you change

33
Q

What is the dependent variable

A

What you measure

34
Q

What is the control variable

A

What is kept constant

Biology (19 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions