IGCSE Biology Exam Study Guide questions with answers

IGCSE Biology Exam Study Guide questions |\ |\ |\ |\ |\ |\




with answers |\




The seven characteristics of living organisms - CORRECT
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ANSWERS ✔✔-Nutrition : taking in , absorbing, and using
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nutrients which contain raw materials for energy for growth and
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tissue repair |\ |\




-Excretion : removal of water products if metabolism , toxic
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materials and substance |\ |\




-Respiration : the chemical reaction that breaks down food to |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


release energy for metabolism
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-Sensitivity : the ability to detect or sense stimuli to make an
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appropriate response |\ |\




-Reproduction : process of making more of the same kind of |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


organism |\




-Growth : an increase in size and dry mass by an increase in cell
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# or cell size or both
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-Movement : an action by an organism causing a change in |\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\


position or place |\ |\




Describe how organisms can be organized - CORRECT ANSWERS
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✔✔- Through the classification system which organizes according
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to the greater/lesser extent of their similarities to other
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organisms

,Define species - CORRECT ANSWERS ✔✔- A specie is a group of
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organisms that share the many similar appearances and can |\ |\ |\ |\ |\ |\ |\ |\ |\


breed with each other |\ |\ |\




Define and describe the binomial system - CORRECT ANSWERS
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✔✔The system of classifying organisms using two names - genus
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and species - which are written in Latin genus (*always Capital
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Letter ) and species (*always Small Letter ) example * Homo
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sapiens * |\




Explain that classification systems in regards to evolutionary
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relationships, morphology and anatomy,DNA and amino acids - |\ |\ |\ |\ |\ |\ |\ |\


CORRECT ANSWERS ✔✔- traditionally base on studies of |\ |\ |\ |\ |\ |\ |\ |\


morphology / anatomy |\ |\ |\




- aims to reflect evolutionary relationships
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- DNA : The sequences of DNA bases and amino acids aid in
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provides more accurate classifications |\ |\ |\




Explain the relationship between a recent ancestor and a distant
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ancestor - CORRECT ANSWERS ✔✔- Your more recent ancestors
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will have base sequences of DNA that have higher similarities
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than those of your distance ancestor
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List the features in the cells of all living organisms - CORRECT
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ANSWERS ✔✔- The cell is the basic unit of structure and function
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of living organisms
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- All living organisms are composed of or more cells
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- Cell arise from pre - existing cells through cell division
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, List the main features of Animals - CORRECT ANSWERS ✔✔- Cells
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have a nucleus , but no cell wall or chloroplast
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- Multicellular (contain many cells )
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- Feeds on organic substances made by other living organisms
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List the main features of Plants - CORRECT ANSWERS ✔✔
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List the main features of Fungus - CORRECT ANSWERS ✔✔- Have
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nucleus |\




- Multicellular
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- Some can be useful while others are harmful
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- Do not have chlorophyll or perform photosynthesis
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- Have cell walls , not made of cellulose
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- Feed parasitically on organic material (feces , human foods ,
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dead plants or animal )
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List the main features of Prokaryotes - CORRECT ANSWERS ✔✔-
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Have gills |\ |\




- Have find
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- All live in water
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- Vertebrates with scaly skin
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List the main features of Protista - CORRECT ANSWERS ✔✔- Adult
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often lives on land
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- Vertebrates with moist , scale - less skin
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- Most live on land , they always go back to water to breed
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