Biomass is lost by: uneaten materials and waste products
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How is biomass lost through uneaten materials?
Organisms do not eat every part of the organism they are consuming (bone) and some organisms die before they are eaten so their remains are left to decay and energy is not passed along food chain.
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How is biomass lost through waste products?
Organisms do not absorb all the food they ingest hence, not as much energy is passed through food chain as previous tropic level.
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State 5 factors that affect food security
Factors that affect food security include: -population increase, demand for certain foods, pests and pathogens, the expense of farming and conflicts.
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Give 2 methods that can prevent overfishing
2 methods to prevent overfishing include having fishing quotas, which limit the number and size of fish that can be caught, and using a bigger mesh size to let the younger fish through until they reach breeding age.
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State 4 advantages of factory farming
Advantages: They help improve efficiency of food production, it makes food cheaper, better standards of living for farmers and it helps to feed an increasing human population.
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State 3 disadvantages of factory farming
Disadvantages: cruel and uncomfortable conditions for animals, crowded conditions can help disease to spread, lots of energy is required to maintain temperature-controlled environment.
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Other cards in this set
Card 2
Front
How is biomass lost through uneaten materials?
Back
Organisms do not eat every part of the organism they are consuming (bone) and some organisms die before they are eaten so their remains are left to decay and energy is not passed along food chain.
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