OCR Combined Science A Papers 2 and 8 Automock

#1. Tapeworms and ticks are examples of parasites – which of these lives inside another organism?

Neither

Ticks

Tapeworms

#2. What do we mean by the distribution of organisms?

The composition of species within a community

How many organisms there are in one quadrat

Where organisms are found

#3. What do we call animals that are eaten by other animals?

Prey

Predators

#4. Which of the following plants have a mutualistic relationship with nitrogen-fixing bacteria?

Select all that apply:

Tomatoes

Beans

Potatoes

Peas

#5. What does abundance measure?

The average number of different species within a community

The number of individuals or frequency of occurrence in an area

The average size of organisms in a population

#6. Complete the equation used to calculate population size: population size = ………….. x total size of it habitat / total area of quadrats

population size = number of organisms in one quadrat x total size of habitat / total area of quadrats

population size = number of organisms in all quadrats x total size of community / total area of quadrats

population size = number of organisms in all quadrats x total size of habitat / total area of quadrats

#7. Is this relationship parasitic or mutualistic? A coral polyp (providing shelter) and single-celled algae (providing food)

Mutualistic

Parasitic

Neither

#8. What are the three domains?

Bacteria, Archaea, and Eukarya

Animals, Plants and Bacteria

Eurkarya, Fungi and Bacteria

#9. Which type of factor is predation?

Biotic

Sub-biotic

Inbiotic

Abiotic

#10. What are biotic factors?

Factors which affect the ability of scientists to sample the environment - leading to errors in measurements

Biological environmental factors which affect the distribution and abundance of organisms

Physical and chemical environmental factors which affect the distribution and abundance of organisms

#11. How does nitrogen in plants get into the soil?

A special kind of fungi extracts the nitrogen from living plants and releases it into the soil

All plants release nitrogen into the soil as they grow

Animals eat plants and die or excrete the nitrogen in their waste.

#12. Which of the following organisms belong to the kingdom – animals?

Select all that apply:

Giant sea kelp

Bottlenose dolphins

Coral polyps

Lions

Emperor penguins

#13. What do we call animals that only eat plants?

#14. Which of the following can we use to investigate the effect of abiotic factors on the distribution of organisms?

A line or belt transect - sampling along a line (or around square) measuring both abundance and abiotic factors

Counting every individual of an entire community within an ecosystem

Single quadrats, placed in separate ecosystems

#15. What are nitrogen-fixing bacteria?

Bacteria that do not need any nitrogen to survive

Bacteria that are eaten as a source of nitrogen

Bacteria that move nitrogen from the air into the soil

#16. Who invented the binomial naming system?

James Brown

Carl Linnaeus

Carl Woese

Uh oh, maybe you need some lessons!

#17. Where does the water in lakes and rivers end up?

oceans

clouds

#18. What is the binomial name for humans?

#19. Why do plants need oxygen?

Plants need oxygen to build their cell walls

Plants need oxygen to process urea

Plants also do aerobic respiration - to get energy from glucose

#20. What is a parasite?

An organism that feeds upon another without killing it

An organism that releases toxic gases and scares its competitors away from meals

An organism that feeds on the same producers as another organism

#21. Where are nitrogen-fixing bacteria found in plants such as peas and beans?

In root nodules

In leaves

In the stem

#22. We sometimes use a transect to perform systematic sampling. This involves which of the following?

Sampling at random

Sampling every time your reach a predefined distance, such as every 5 metres

Sampling using a complex system of North, South, East and West samples combined with a random coin-flip to determine direction

#23. Sometimes it is not possible to measure the number of organisms in a transect, for example when measuring the distribution of plants. In this case we use an alternative measure called what?

Percentage cover

Average size of organisms

#24. Which of the following is the source of oil and gas?

nuclear decay from millions of years ago

dead plankton from millions of years ago

dead and buried plant material from millions of years ago

#25. Which term do we use to describe the relationships between species that depend on each other for resources?

Interdependent

Intradependent

Codependent

Extradependent

#26. How do we describe the periodic changes in population size of predators and prey – explained by increases in numbers of predators due to increased numbers of prey and then decreasing numbers of prey due to increasing numbers of predators and so on?

Competition-driven cyclic abundance shifts

Abiotic-Biotic cycles

Predator-Prey cycles

#27. Which type of factor is nutrient availability?

Inbiotic

Abiotic

Sub-biotic

Biotic

#28. Why can humans only survive a few days without water?

most of our body is made of water and it is continually lost to the environment

without water our mouths become too dry to speak

water allows us to swallow our food

#29. Which of these is an example of a parasitic relationship? 1) An insect and a flower 2) A vampire bat and a cow 3) A coral polyp and single-celled algae

1

2

3

#30. Is the following statement accurate: nitrogen be can be moved back and forth from the atmosphere and into the soil by bacteria.

Yes

No

#31. What natural source of nitrogen is sometimes added to fields by farmers?

#32. Which type of factor is pollution?

Inbiotic

Biotic

Abiotic

Sub-biotic

#33. By which process does water in the oceans and lakes move into the atmosphere?

evaporation

sublimation

precipitation

distillation

condensation

#34. Finish the sentence: Nitrogen compounds found in artificial fertilisers are ……… and dissolve in the soil’s water.

permeable

soluble

potable

#35. Which type of factor is competition?

Inbiotic

Abiotic

Biotic

Sub-biotic

#36. Respiration from animals is a source of carbon dioxide in the atmosphere – do plants also use respiration?

yes

only carnivorous plants perform respiration

no

#37. Which of these is a community?

Includes all of the individuals of a particular species in an environment

Includes the local environment where an organism normally lives

Includes all of the organisms in a particular environment as well as the environment itself

Includes all of the organisms that live in a particular environment

#38. Is this relationship parasitic or mutualistic? A crocodile which lets a small bird feed on leftover meat between its teeth

Mutualistic

Neither

Parasitic

#39. Which organisms maintain the nitrogen levels in the soil?

Recomposers

Decomposers

Decomposters

#40. Is the following statement accurate? Lightning can cause atmospheric nitrogen to be released into the rain and be washed into the soil?

No

Yes

#41. Which square instrument do we use for randomly sampling population sizes?

#42. How much of the atmosphere is composed of nitrogen?

approximately 50%

approximately 80%

approximately 10 %

#43. In a scientific investigation, you and two others randomly sample a rocky shore using quadrats. You find that on average there are 2 crabs per quadrat and the whole shore would be covered by 150 quadrats. Estimate how many crabs are on the whole shore.

175

450

150

300

#44. Match the description to the correct term. All of the organisms that live in a particular pond.

Ecosystem

Population

Habitat

Community

#45. Why do plants need nitrogen?

They have compounds containing nitrogen in their DNA and in proteins

Nitrogen is a key ingredient in photosynthesis

Nitrogen is one of the ingredients in cellulose which makes up their cell walls

#46. How can parasites affect the nutrition of their hosts?

By taking some of their nutrients for themselves - leaving less for the hosts

By making feeding more difficult for their hosts

By poisoning the hosts until they perish

#47. The binomial name for tigers is Felis tigris. Which part of the name represents the genus?

Felis

tigris

#48. Which of these substances is sometimes added to water to make it potable?

hydrogen

chlorine

ice

lead

#49. What is potable water?

you can drink it safely

you cannot drink it safely

you can put it in a pot

#50. Name two resources that both animals and plants need to survive and reproduce? ? structure your answer like this: ..... and .....

#51. True or false – plants remove carbon from the atmosphere during photosynthesis

true

false

#52. Which type of factor is parasitism?

Sub-biotic

Biotic

Abiotic

Inbiotic

#53. What is groundwater?

water with ground in it

water stored as ice

water in clouds

water in rocks and soil

#54. True or false – volcanism removes carbon from the atmosphere

false

true

#55. Which type of factor is air temperature?

Sub-biotic

Biotic

Abiotic

Inbiotic

#56. Which type of factor is disease?

Biotic

Abiotic

Inbiotic

Sub-biotic

#57. What groups of organisms belong to the domain – eukaryotes? ? Eukaryotes have a membrane bound nucleus

Select all that apply:

Plants

Animals

Archaea

Fungi

Bacteria

Protists

#58. Which type of factor is soil composition?

Inbiotic

Sub-biotic

Biotic

Abiotic

#59. The 5 kingdoms of life are Animals, Plants, Fungi, Protists and Prokaryotes. Which kingdom do algae belong to?

#60. By which process does water in the clouds move onto land?

evaporation

sublimation

condensation

precipitation

distillation

GCSE OCR Combined Science A Papers 2 and 8

Results

#1. Tapeworms and ticks are examples of parasites – which of these lives inside another organism?

#2. What do we mean by the distribution of organisms?

#3. What do we call animals that are eaten by other animals?

#4. Which of the following plants have a mutualistic relationship with nitrogen-fixing bacteria?

#5. What does abundance measure?

#6. Complete the equation used to calculate population size: population size = ………….. x total size of it habitat / total area of quadrats

#7. Is this relationship parasitic or mutualistic? A coral polyp (providing shelter) and single-celled algae (providing food)

#8. What are the three domains?

#9. Which type of factor is predation?

#10. What are biotic factors?

#11. How does nitrogen in plants get into the soil?

#12. Which of the following organisms belong to the kingdom – animals?

#13. What do we call animals that only eat plants?

#14. Which of the following can we use to investigate the effect of abiotic factors on the distribution of organisms?

#15. What are nitrogen-fixing bacteria?

#16. Who invented the binomial naming system?

#17. Where does the water in lakes and rivers end up?

#18. What is the binomial name for humans?

#19. Why do plants need oxygen?

#20. What is a parasite?

#21. Where are nitrogen-fixing bacteria found in plants such as peas and beans?

#22. We sometimes use a transect to perform systematic sampling. This involves which of the following?

#23. Sometimes it is not possible to measure the number of organisms in a transect, for example when measuring the distribution of plants. In this case we use an alternative measure called what?

#24. Which of the following is the source of oil and gas?

#25. Which term do we use to describe the relationships between species that depend on each other for resources?

#26. How do we describe the periodic changes in population size of predators and prey – explained by increases in numbers of predators due to increased numbers of prey and then decreasing numbers of prey due to increasing numbers of predators and so on?

#27. Which type of factor is nutrient availability?

#28. Why can humans only survive a few days without water?

#29. Which of these is an example of a parasitic relationship? 1) An insect and a flower 2) A vampire bat and a cow 3) A coral polyp and single-celled algae

#30. Is the following statement accurate: nitrogen be can be moved back and forth from the atmosphere and into the soil by bacteria.

#31. What natural source of nitrogen is sometimes added to fields by farmers?

#32. Which type of factor is pollution?

#33. By which process does water in the oceans and lakes move into the atmosphere?

#34. Finish the sentence: Nitrogen compounds found in artificial fertilisers are ……… and dissolve in the soil’s water.

#35. Which type of factor is competition?

#36. Respiration from animals is a source of carbon dioxide in the atmosphere – do plants also use respiration?

#37. Which of these is a community?

#38. Is this relationship parasitic or mutualistic? A crocodile which lets a small bird feed on leftover meat between its teeth

#39. Which organisms maintain the nitrogen levels in the soil?

#40. Is the following statement accurate? Lightning can cause atmospheric nitrogen to be released into the rain and be washed into the soil?

#41. Which square instrument do we use for randomly sampling population sizes?

#42. How much of the atmosphere is composed of nitrogen?

#43. In a scientific investigation, you and two others randomly sample a rocky shore using quadrats. You find that on average there are 2 crabs per quadrat and the whole shore would be covered by 150 quadrats. Estimate how many crabs are on the whole shore.

#44. Match the description to the correct term. All of the organisms that live in a particular pond.

#45. Why do plants need nitrogen?

#46. How can parasites affect the nutrition of their hosts?

#47. The binomial name for tigers is Felis tigris. Which part of the name represents the genus?

#48. Which of these substances is sometimes added to water to make it potable?

#49. What is potable water?

#50. Name two resources that both animals and plants need to survive and reproduce? ? structure your answer like this: ..... and .....

#51. True or false – plants remove carbon from the atmosphere during photosynthesis

#52. Which type of factor is parasitism?

#53. What is groundwater?

#54. True or false – volcanism removes carbon from the atmosphere

#55. Which type of factor is air temperature?

#56. Which type of factor is disease?

#57. What groups of organisms belong to the domain – eukaryotes? ? Eukaryotes have a membrane bound nucleus

#58. Which type of factor is soil composition?

#59. The 5 kingdoms of life are Animals, Plants, Fungi, Protists and Prokaryotes. Which kingdom do algae belong to?

#60. By which process does water in the clouds move onto land?

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