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Z-Biology-Wrong Answers > Unit 7 > Flashcards

Unit 7 Flashcards

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1
Q

Name two factors that plants often compete with each other for

A

Sunlight and space

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2
Q

What is a relationship called where each species depends on other species

A

Interdependent

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3
Q

What is meant by the term stable community

A

A community with all species and environmental factors are in balance
The population size remains constant

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4
Q

What abiotic Factor could affect the distribution of animals living in aquatic areas

A

Oxygen levels

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5
Q

Suggest two abiotic factors that could affect the distribution of plants growing in soil

A

Moisture level and soil pH

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6
Q

Name one group of organisms that can live in deep sea vents where temperatures are very high

A

Bacteria

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7
Q

Suggest how having spines instead of leaves allows cacti to live in desert conditions

A

It reduces water loss

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8
Q

Suggest how having a swollen storage stem allow cacti to live in desert conditions

A

It helps store water

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9
Q

What is a functional adaptation

A

An adaptation that helps an organism Survive by carrying out normal functions

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10
Q

How does a producer produce biomass for the rest of the food chain(3)

A

They produce glucose by carrying out photosynthesis. It then uses glucose to make biological molecules that make up the plant biomass.

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11
Q

Why is it important that quadrats are placed randomly in a field

A

It avoids the data being biased

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12
Q

Describe the importance of Decay in the carbon cycle

A

Carbon dioxide is return back to the atmosphere when the microorganisms involved in decay respire

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13
Q

Why is a biomass generators built Underground

A

To regulate temperature and ensure it stays cool

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14
Q

What do gardeners use compost for

`

A

Fertiliser

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15
Q

Describe three conditions that gardeners should use to produce compost quickly

A

It should be warm with the water available and lots of oxygen

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16
Q

Define biodiversity

A

The variety of different species of organisms on Earth or within an ecosystem

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17
Q

State two reasons why humans are using more resources

A

A rising population

The standard of living is increasing

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18
Q

State two ways water can become polluted

A

Sewage and pesticides

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19
Q

State two substances that pollute the air when they are released into the atmosphere

A

Smoke and acidic gases

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20
Q

Give two reasons why using a herbicide can reduce biodiversity

A

It reduces the variety of plants on the land by Killing the weeds and it may kill plants and animals if it’s washed into nearby water

21
Q

Explain why a high biodiversity create a stable ecosystem

A

Because all the different species in the ecosystem depend on each other. Species can also help to maintain the right physical environment for each other

22
Q

Suggest why global warming might cause land to become flooded

A

Higher temperatures can cause seawater to expand with good causes sea level to rise above low lying land

23
Q

Suggest two consequences of global warming

A

Reduce biodiversity

Changes to the migration patterns of some animals

24
Q

How do humans reduce the amount of land available for other plants and animals

A

Building and farming

25
Q

Why are peat bogs destroyed by humans

A

Peat can be burnt as fuel in used as a fertiliser

26
Q

Explain what problem burning peak cankles

A

It releases carbon dioxide which contribute towards global warming

27
Q

Explain the effect that the destruction of peat bogs has on biodiversity

A

It reduces biodiversity because it destroys habitat or reduces the area of habitat

28
Q

Explain why is large scale Deforestation has been required to produce biofuels

A

To clear land to grow their crops needed to produce biofuels

29
Q

State two reasons for large scale deforestation

A

To provide land for cattle and provide land to grow crops

30
Q

Suggest and explain two harmful effects on the environment caused by the destruction of trees

A

Increases the amount of carbon dioxide in the atmosphere because carbon there released by burning wood
It leads to a reduction in biodiversity because tree habitats are destroyed

31
Q

The government encourages people to recycle as much of their waste as possible. Suggest how this could help protect ecosystems.

A

This can reduce amount of land taken over for landfill, leaving systems in place

32
Q

Suggest what effect monoculture have on biodiversity

A

It reduces biodiversity because the habitat can’t support a wide range of organisms

33
Q

Explain why farmers who grow crops using monoculture may be advised to leave strips of grasslands and plant hedgerows around the edge of the crop

A

To increase the biodiversity of land by improving habitats and food sources

34
Q

Suggest why some people might be opposed to programs that maintain biodiversity

A

It cost money to protect biodiversity and some People may feel that money should be spent on other things
Some people may want to kill organisms that are regarded as pests to protect crops and livestock
Some people may want to use lamb for new housing agriculture

35
Q

What is an apex predator

A

A carnivore that has no predators

36
Q

What is the role of decomposers in ecosystems

A

Decomposers break down and recycle any dead plant or animal material in the environment. They do this by secreting enzymes which break down the dead material into small soluble molecules. They take up these molecules by diffusion

37
Q

Why are there usually only 4 or 5 trophic levels in a food chain

A

Because biomass decreases as trophic levels increases so there’s not enough energy to support more levels

38
Q

What happens to ingested material that does not get absorbed

A

It will be egested as faeces

39
Q

Name two substances lost as waste in urine

A

Water and urea

40
Q

Explain how respiration affects the amount of biomass that is transferred from one trophic level to the next

A

Glucose is used in respiration to provide energy from them to make biomass. Also, respiration produces carbon dioxide and water and waste products which are lost from the body and therefore not passed on as biomass.

41
Q

Explain why it’s important to maintain fish stocks at a level where breeding continues

A

To prevent species from becoming extinct

42
Q

Explain why when rearing fish, movement is restricted

A

Less energy is spent on movements in more energy can be spent on growth

43
Q

Why are carnivorous fish less efficient to farm them plant eating fish

A

Carnivorous fish or a higher trophic level so more biomass will have been lost from the food chain by that level. This means is less efficient

44
Q

The global production and consumption of meat is increasing. Suggest what effect increasing meat consumption may have on global Food security.

A

It could threaten global Food security because more crops are needed to produce more meat to meet the increasing demand, so there are fewer Crops available to produce food for the global population.

45
Q

Give one use for genetically modified bacteria

A

Producing human insulin

46
Q

Suggest two advantages of GM crops

A

They could provide more food and they could provide food with an improved nutritional value

47
Q

What’s the name of the fungus that use to produce mycoprotein

A

Fusarium

48
Q

What are the conditions like in when producing mycoprotein

A

Aerobic

Z-Biology-Wrong Answers (7 decks)

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