14.1 - 2016 June Q2*
(a) The diagram shows a food web for a pond.
(i) Name a secondary consumer in the food web that feeds on insect larvae. (1)
(ii) Algae are producers that carry out photosynthesis. Complete the word equation for photosynthesis. (2)
(ii) Algae are producers that carry out photosynthesis. Complete the word equation for photosynthesis. (2)
carbon dioxide + ............................... -> ................................ + oxygen
(iii) Algae can use the products from photosynthesis to produce starch. Describe a test for starch. (2)
(b) The diagram represents the flow of energy through a food chain.
Calculate the percentage of energy transferred from grass to sheep. Show your working. (2)
Percentage = .............................. %
(c) Some of the energy stored in the grass is transferred to herbivores and decomposers.
(i) Name a type of organism that can act as a decomposer. (1)
(ii) Some of the energy in the grass is lost from the sheep into the surroundings.
Suggest one way in which a farmer could reduce the percentage energy lost from his sheep. (1)
(i) Name a type of organism that can act as a decomposer. (1)
(ii) Some of the energy in the grass is lost from the sheep into the surroundings.
Suggest one way in which a farmer could reduce the percentage energy lost from his sheep. (1)