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22 December 2009
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Standard Grade Bitesize Revision

Ask a Teacher - Biology - Biospheres


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Ask a Teacher - Biology - Biospheres

circle Could you please tell me what abiotic factors are? Go!
circle What is the relative success of internal and external fertilisation in relation to the colonisation of terrestrial and aquatic environments? Go!
circle I don't understand the abiotic and biotic factors. Go!
circle Can you please explain the nitrogen cycle to me in layman's terms. Go!
circle I am having problems when answering questions to do with the Nitrogen Cycle. What is a good way of learning it? Go!
circle I have trouble understanding the nitrogen and carbon dioxide cycles, in fact I know nothing about them and just guess the answers! I did not do very well in my prelim (4,4) but I recently bought past papers and I think they really helped, and I got a 1 for my investigations but I'm worried that the cycles will let me down, do you have any tips on how I can learn the cycles? Go!
circle In class I have only been taught the nitrogen cycle, but in my textbook there are other cycles like the carbon and mineral salt cycle. Should I try and learn these? Go!
circle What could happen to Britain's moorland habitats and communities if reafforestation schemes were allowed to go unchecked? Go!
circle The wood mouse is a major source of food for owls. Suggest THREE factors, other than the number of owls, which would affect the wood mouse population? Go!
circle Can you help me explain the chemical reactions that have to be considered in an artificial ecosystem, and what biotic factors can ensure that these chemical reactions are balanced in the artificial ecosystem? Go!
circle Can you give some examples of pollution indicator organisms please? Go!
circle I am unsure about what invertebrates are and I am also unsure about whether snakes are invertebrates or not Go!
circle What are the conditions needed for decay to be carried out and what is the definition of decay? Go!
circle What is competition? Go!
circle Could you please explain the pyramid of biomass to me. I understand the pyramid of numbers but not biomass. Also, could you please tell me whether or not I need to know a definition for the course? Go!
circle Could you please tell me what I should know about the nitrogen and carbon cycle for the credit exam? (the bare minimum). I understand a bit about the cycle but I feel it's still not enough. Go!
circle Energy and total mass decrease at each successive stage of a food chain. What else can decrease at each successive stage? Go!
circle What is biomass? Go!
circle What is a abiotic factor? Go!
circle I understand regular pyramids of biomass but I get confused when irregular pyramids come up, like when the base is tiny and then next stage up is huge. What does this type of pyramid represent? Go!
circle What is the difference between an abiotic factor and a biotic factor? Go!
circle Is there a useful way to help me remember producers and consumers in food web diagrams? Go!
circle What exactly is a population and ecosystem? Go!
circle I was looking over my notes for Biology recently and realised I didn't know the carbon cycle. Our teacher had told us to draw a carbon cycle while she was away one day and I was unsure of whether I should know it. It doesn't seem to be in my learning outcomes for the topic so should I know it? Go!
circle What is meant by pyramid of biomass? Go!
circle Why does eutrophication happen? Go!
circle What does plankton feed on? Go!
circle What are producers in Biology? Go!
circle What is an indicator species? Go!
circle I have been looking through my notes about the Nitrogen Cycle and I was wondering what main facts about the Nitrogen cycle do I need to know for the exam and is there an easy way to remember the Nitrogen cycle process? Go!
circle I'm having difficulty with food webs. I can't seem to understand what would happen if certain organisms were removed. Could you please help me? Go!
circle What is the distinct difference between the pyramid of numbers and the pyramid of biomass? Thanks Go!
circle How could 'Pyramid of Biomass' be defined if this question was asked in the examination? Go!
circle Can you describe to me and tell me all about indicator species more than the types would be of great help? Go!
circle I understand pyramids of biomass when the pyramid is regularly shaped but I don't understand the pyramids which are irregular. The base is small but then the next bit up from that is bigger, what is it meant to represent? Go!
circle I don't understand the Nitrogen Cycle. Could you please explain it to me? Is there any easy way to remember it? Go!
circle What is a pyramid food chart? Go!
circle What is the definition of a producer? And what is the definition of a consumer? Go!
circle Can you help me understand the nitrogen cycle? Go!
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