Question 3 Paper type: Paper 2Paper 2 5 marksFigure 1. Ocean food web.a) State the source of energy for the ocean food web illustrated in Figure 1. (1)b) Identify two secondary consumers within Figure 1. (2)c) Predict two impacts of overfishing of Arctic cod on the rest of the food web. (2)View example answer and mark scheme

Question 2 Paper type: Paper 2Paper 2 7 marksFigure 1. Trends in aquaculture and fisheries between 1950 to 2005.(Source: UNEP)a) Calculate the mean annual increase in the total amount of fish harvested between 1950 and 2005. (1)b) Identify two reasons for the change in the amount of fish consumed between 1950 and 2005. (2)c) i) Describe TWO environmental impacts of intensive capture fisheries. (2)    ii) Describe TWO environmental impacts of intensive aquaculture. (2)

Select all the correct answers.In an aquatic ecosystem, the fishing of a particular fish species increased. This fish species is a secondary consumer in an energy pyramid. The fishing of the species led to a decrease in its population. In which two ways will this affect the food web? The higher levels in the pyramid will receive more energy. The higher levels in the pyramid will receive less energy. The lower levels in the pyramid will have less predation. The higher levels in the pyramid will receive no energy at all. The lower levels in the pyramid will receive less energy.

In food web, each successive trophic level has?  A. Increased total energy  B. Less total energy content  C. More total energy content  D. Non estimated energy content

13) In lines given above, it is stated that “Food web A represents a more diverse ecosystem with, as a result, many more alternative feeding pathways.” Look at FOOD WEB A. Only two animals in this food web have three direct(immediate) food sources. Which two animals are they?*1 pointNative Cat and Parasitic WaspNative Cat and Butcher BirdParasitic Wasp and SpiderNative Cat and HoneyeaterOption 514) . Food webs A and B are in different locations. Imagine if Leaf Hoppers died out in both locations. Which one of these is the best prediction and explanation for the effect this would have on the food webs?*1 pointThe effect would be greater in food web A because the Parasitic Wasp has only one food source in web A.The effect would be greater in food web A because the Parasitic Wasp has several food sources in web A.The effect would be greater in food web B because the Parasitic Wasp has only one food source in web BThe effect would be greater in food web B because the Parasitic Wasp has several food sources in web B.15) Which of these statements is NOT true?*1 pointAn animal can be located at more than one type of trophic level in a food webThe position of an organism in a food chain is due to its food preferencesUnlike food chains, food webs represent multidirectional transfer of energyFood web is made due to species that occur in more than one food chain16)  Organisms of a higher trophic level which feed on several types of organisms belonging to a number of lower trophic levels constitute*1 pointFood webFood chainEcological pyramidEcosystem

Describe how energy would enter the food web