Organisms in the environment 0.0 / 5 ? BiologyEcology and Environmental ScienceGCSEAQA Created by: Sam EvansCreated on: 31-12-14 17:15 Name the solution used to test a leaf for starch Iodine solution 1 of 10 What is the result of the iodine test for starch? The starchier areas will turn blue-black and the less starchy areas will turn yellowy brown 2 of 10 What is the word equation for photosynthesis? carbon dioxide + water --> glucose + oxygen 3 of 10 Give three physical factors which affect the distribution of plants. temperature, water and oxygen 4 of 10 Why would there be little point in heating a greenhouse on a summer's day? It will be a waste of energy as it will be hot anyway. The rate of photosynthesis may stop as it will be too hot 5 of 10 What is meant by the term 'limiting factor' in photosynthesis? Factors such as light, temperature and carbon dioxide which may prevent the rate of photosynthesis increasing above a certain point 6 of 10 How can you use a quadrat to make a line transect? A line is marked between two point and then the quadrat is placed at regular intervals along along the line. The organisms in the quadrat are counted. 7 of 10 What is the difference between a mean and a median? The mean is the total of all number divided by the amount of numbers and the median is the middle number 8 of 10 Why is it difficult to be sure an investigation in outdoor habitats is valid? There are so many variables which are difficult to control 9 of 10 What is meant by 'reproducible' results? A reproducible result is a result that is the same if someone repeats the experiment. 10 of 10
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