Energy Losses
21 important questions on Energy Losses
Food chain terminology
What energy from the sun doesn't get used up for PSS?(4)
- Some passes straight through the leaf
- some warms the leaf
- some is reflected (green light)
- Some hits parts that don't photosynthesise
How is energy lost when a lion eats a Zebra? (4)
- The lion doesn't eat the whole zebra
- some parts don't get digested
- while alive the zebra lost some of the energy in faeces and urine
- While alive the zebra released energy by respiration and used it for movement, maintaining its body temperature, producing and secreting new substances, active transport, growth
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How much energy available is usually passed on to the next stage?
What is the equation for ecological efficiency?
---------------------------------------------- x100%
amount of energy available at last stage
What happens to the animal under intensive farmer techniques?(5)
- put weight on faster
- reach marketable size faster
- more profit
- more energy goes into egg production
- more eggs
How does a farmer reduce energy losses?
What are the advantages of free range eggs? (8)
- more humane
- natural food sources
- happy hens that live a long life
- can dust bathe
- can perch
- can find nest
- no machinery
- less debeaking
What are the advantages of Intensive eggs? (7)
- More eggs
- Cheaper
- More efficient
- Less land
- No predators
- More profit
- No energy wasted
Why do we need to conserve fish stocks?
How can the government ensure sustainable fishing?
- Introduce fishing quotas
- Minimum mesh size so young generation can escape.
Why are food miles bad?
What are the reasons for food miles?
What is food security?
What factors can affect food security? (5)
- An increasing birth rate
- new pests affecting crops/farm animals
- cost of agricultural supplies
- export of food from poorer countries
- climate change
What is a waste product of mycoprotein?
How is mycoprotein produced?
- With a good oxygen supply it grows and reproduces rapidly doubling its mass every five hours
- It is harvested and purified from the fermenter.
- It is then dried and processed to become a mycoprotein.
- It is pale yellow with a faint taste of mushrooms.
How does mycoprotein become quorn?
What organisms are responsible for decay?
How do microbes get glucose from the thing they are decaying for respiration?
What are 3 conditions needed for decay to occur
- Warm- microbes multiply in warm conditions
- Moist- microbes multiply in moist conditions
- Oxygen- microbes need oxygen for respiration
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