CIE Biology Paper-1: Specimen Questions 78 - 79 of 109
Question number: 78
The graph shows how the concentration of oxygen and numbers of fishes and bacteria in a river when sewage flows into it. Dotted curve represents ________
concentration of bacteria
Concentration of total dissolved solids
Concentration of fishes
Concentration of oxygen
Dissolved oxygen is important in many forms of life like fish, invertebrates, bacteria and plants. These organisms use oxygen in respiration.
Question number: 79
the figure shows different living organisms living in aquatic ecosystem. Which process do all living organisms carry out?
Respiration is the characteristics of all living organisms. In given diagram photosynthesis process Flowering and pollination, are only carried out by plants. Respiration occur in all living organisms given in this diagram. Respiration is a process in which movement of oxygen from the outside air to the cells within tissues, and the transport of carbon dioxide in the opposite direction.