BIOLOGY B1 5 AND 6

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BIOLOGY AQA

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Question Answer
What is the single source of energy for all living organisms? The sun (Solar or light energy)
What is biomass? The dry mass of living material in any living animal or plant
What is a pyramid of biomass? The mass of each living material at each stage of the food chain is less than that at the previous stage. The biomass at each stage can be drawn to scale and shown in a pyramid of biomass
How is some energy transferred to the environment? Some materials and energy are lost as waste, some are used in respiration to supply energy for living processes like movement and much energy is lost through heat transfer to the surroundings
Why do things decay? Materials decay because they are broken down (digested) by microorganisms
What conditions help decay? Moist, warm conditions with oxygen
What is the carbon cycle? 29_4_the_carbon_cycle.gif (image/gif)
Why should we recycle organic kitchen and garden waste? to reduce landfill, reduce the production of methane and to recycle the organic minerals and nutrients
How do parents pass on genetic information to their offspring? through sex cells (Gametes)
In which part of a cell is the genetic information found? The nucleus, it contains chromosomes and they carry genes and DNA that control the characteristics of your body
What is asexual reproduction? Reproduction only involving one parent, there is no joining of special sex cells and no variation in the offspring. Their genetic material is identical to that of their parent
What is sexual reproduction? Sexual reproduction involves the joining of a female egg and male sperm. These two gametes join to create a new individual
How does sexual reproduction create variation within the child? The mixture of genetic information from both parents leads to genetic variation in the offspring
What makes you different from the rest of your family? Different characteristics between individuals of a family or species may be due to genetic causes, environmental causes or a mixture of both
How do we clone plants? By taking cuttings of mature plants, the new plants are genetically identical to the older one. By tissue culture using cells from a small part of the original plant
How do we clone animals? By transplanting cloned embryos
What is genetic engineering? Changing the genetic material of an organism
How are genes transferred from one organism to another? transferring_genetic.jpg (image/jpg)