1.4.8 + 9 Nutrient Recycling & Human Impact FMQuiz Homework Solution
Q. What is meant by nitrogen fixation?
A. The conversion of nitrogen into nitrates
Q. Suggest two reasons for conserving wild species.
A. Recreational / food supplies / possible sources
of drugs / prevent extinction / biodiversity
Q. Name an important group of biomolecules that
plants make from nitrates.
A. Proteins
Q. State one conservation practice from fisheries.
A. e.g. control of mesh size
Q. The term used to describe micro-organisms and
other organisms that return nutrients to the
environment by decay is …
A. Decomposers
Q. Outline the problems associated with the
disposal of waste.
A. Toxicity / non-biodegradable / pollute rivers /
availability of land-fill / incineration causes toxins
Q. Explain the term ectoparasite.
A. Organism living on host (or explained) / causing
damage
Q. State one conservation practice from forestry.
A. e.g. plant trees
Q. What is meant by nitrification?
A. The process of converting ammonia into nitrites
and/or nitrites to nitrates
Q. Farmers add nitrates as fertilizers to the soil, but
not when heavy rain is forecast. Why not?
A. Fertiliser may be washed off the land /
eutrophication
Q. Name a group of organisms involved in nitrogen
fixation.
A. Bacteria / Monera / Lichens/ Clover / Legumes
Q. Give an example of the use of micro-organisms
in waste management.
A. Landfill sites / sewage treatment plants /
digesters / compost heaps
Q. Give an advantage for the incineration of
domestic waste.
A. Amount of waste greatly reduced or Useable
heat or Reduced landfill
Q. Suggest why continual monitoring of the
environment is valuable.
A. To detect change(s) early or To remedy effect of
change or To detect levels of pollutants
Q. Explain the term decomposition.
A. Decaying / rotting
Q. Why are elements recycled in nature?
A. Limited supply or words to that affect or reused
Q. What is meant by pollution?
A. The harmful addition to the environment by
humans
Q. Give an example of a human activity that results
in the pollution of air.
A. e.g. burning fossil fuels
Q. Explain conservation in relation to wild plants
and animals.
A. The protection, preservation and wise
management of endangered plants and animals
Q. Suggest two ways of minimising waste.
A. Reduce or Recycle or Re-use
Q. Give a disadvantage for the incineration of
domestic waste.
A. Harmful products produced
Q. Give an example of a human activity that results
in the pollution of water.
A. e.g. fertiliser run-off
Q. Why is waste management becoming an
increasingly difficult problem?
A. Increasing population & consumption; Too little
recycling; Shortage of landfill sites
Q. State one conservation practice from
agriculture.
A. e.g. control of fertiliser usage
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