10.2 3 Nutrient recycling

Question 1

mineral needed

Answer 1

to produce macromolecules

Question 2

cycles

Answer 2

involve biotic stage (inorganic ions are incoperated into the tissues of living things) and abiotic (inorganic ions are returned to the non-living part of the ecosystem#)

Question 3

Nutrients held in dead animals+plants, animal droppings and urine

Answer 3

released back to the soil and air by action of decompsers -bacterial and fungi

Question 4

conditions for recycling nutrients

Answer 4

enzyme need optimum warmer temperatures

mosit conditions easier to dissolve food

Question 5

Significance of nittogen

Answer 5

amino acids and proteins DNA RNA

Question 6

Cannot use nitrogen gas

Answer 6

as inert -must be in the form of nitrates

Question 7

How are nitrates in soil returned

Answer 7

-Urine+faeces
-Bodies
broken down to form ammonium compounds by decomposers
then oxisidised by nitrifying bacteria converts the to nitrates

Question 8

Nitrogen fixing bacteria

Answer 8

convert nitrogen from air into ammonia then converted into nitrates by nitrifying bacteria

Question 9

Legumes

Answer 9

plants that have nodules on roots that are full of nitrogen fixing bacteria
mutualism-bacteria get protection and supply of organic food from plant and plant gets ammonia use to form amino acids

Question 10

Denitrifying

Answer 10

use nitrates as an energy source and break them into nitrogen gas

Question 11

lightening

Answer 11

can take nitrogen in air to nitrate in soil

Question 12

Carbon is vital

Answer 12

all main molecules of life based on carbon atoms

Question 13

Carbon dioxide removed by air

Answer 13

by green plants in process of photosynthesis
used to make body of plants
then eaten by animals

Question 14

Carbon dioxide returned to the air

Answer 14

When animals respire release back

plants and animal die bodies broken down by decomposers when microbes respire release carbon dioxide

Question 15

Carbon dioxide also released into the air

Answer 15

By combustion when anything that has been living id burnt

Question 16

Carbon sinks

Answer 16

reservoir where carbon is removed from the atmosphere and locked up in organic or inorganic compounds

Question 17

biotic carbon sinks

Answer 17

via photosynthesis stored in the bodies of living organisms

Question 18

abiotic carbon sinks

Answer 18

soil contains carbon rich material in the form of humus
rocks e.g. limestone and chalk or fossil fuels such as coal oil and natural gas
oceans dissolved inorganic carbon
calcium carbonate shells by marine organisms and coral reefs