Biology - Distribution of organisms 5.0 / 5 based on 1 rating ? BiologyDistribution of organisms.GCSEAQA Created by: baggiez_boiCreated on: 28-04-14 19:50 What physical factors affect the distribution of organisms? Temperature, amount of light and the availability of light/nutrients/oxygen/carbon dioxide. 1 of 9 What are two things are used to help collect quantitive data about organisms in their habitat? Transects and quadrats. 2 of 9 What is a transect? A line across a habitat or part of a habitat, can be simple as a piece of string or rope placed in a line on the ground. 3 of 9 Where is the number of organisms or species observed and recorded? At regular intervals along the transect. 4 of 9 What is a quadrat? Usually a square made of metal and may contain further wires to mark smaller areas inside. 5 of 9 How are the number or organisms observed and recorded? The number of tehm in the quadrat or small section of a quadrat are counted. 6 of 9 How is a representive sample taken using a quadrat? It should be placed randomly. 7 of 9 The more quadrats that are anylysed, the better the what? The vadility and reproductivabilty of the results. 8 of 9 What can quadrats also be used for apart from organisms? For slow moving animals. 9 of 9
Comments
Report