Biology; Chapter 3, The Environment Flashcards
To reduce the impact of development on the environment…
It is important to collect detailed and reliable biological data and to monitor any changes.
The needs of wildlife need to be…
Balanced with human requirements for food and economic development
Pollution in streams and rivers can be monitored by…
Measuring oxygen levels or pH, or by looking for the presence of indicator species.
Heavy metals and pesticides entering food chains can cause…
Particular health problems for animals higher in a food chain because they get more concentrated as the food chain progresses.
Untreated sewage can cause…
Rapid growth if Algae in fresh water. When these plants die, the bacteria that decay them reduce the oxygen levels in the water, causing fish and other animals to die as a result.
The arrows on food chains and food webs …
Show the transfer of energy in the food chain/web.
Much if the sunlight energy…
Is not absorbed or used effectively by plants.
Is all the energy used at each stage in the food chain?
No, at each stage in a food chain, some energy is wasted.
Name the two types of pyramid which can be used to represent the amount of organisms at each feeding level.
Pyramids of NUMBER and BIOMASS can be used to represent the amount of organisms at each stage in the food chain.
Which type of pyramid is the most accurate?
Pyramids of BIOMASS are the most accurate because it represents the total mass of the organisms at each stage in a food chain.
Name the organisms which bring about the decay of dead bodies and waste materials.
MICROBES bring about the decay of dead bodies and waste materials. In doing so they respire and release Carbon Dioxide into the atmosphere.
Which three gases are constantly reused in nature (cycled)
Carbon, Nitrogen and Phosphorus.
Name the processes of the Carbon Cycle.
Fossilisation, feeding, death, decay, photosynthesis, respiration and combustion.
