(a)[4]
Construct a food web showing how energy moves between organisms in this ecosystem.
(b(i))[1]
In the remaining months of the year, reindeer eat a different food source. This food source contains a carbohydrate called lichenan. Reindeer are the only animals able to digest lichenan. List the chemical elements that are present in a molecule of lichenan.
(b(ii))[1]
State one benefit to reindeer of consuming food that contains lichenan.
(b(iii))[2]
Use your knowledge of how cell function is controlled to suggest why other animals cannot digest lichenan.