Biology 9700 · AS & A Level · Testing for biological molecules
Testing for biological molecules — practice question
A group of students carried out an ecological investigation of a defined stretch of seashore (A) in Brittany, France. One team chose to examine a rockpool (B) and recorded data such as the oxygen concentration and temperature of the seawater (C). After examining all the different living organisms (D) found in the rockpool, the students chose to study the limpets, Patella vulgata (E), in more detail. They gathered information on the role of the limpets in the rockpool, including interactions with other organisms (F). For instance, limpets grazed on green seaweeds, while the shore crab, Carcinus maenas, fed on small limpets.
(a)[4]
State the correct letter, A to F, from the passage above that matches each ecological term listed below: habitat; ecosystem; abiotic component; ecological niche; population; community.
(b)[4]
State the trophic levels that each organism named in the passage occupies and outline the energy losses that occur in the food chain.
Worked solution & mark scheme
This 8-mark question has a full step-by-step worked solution and mark scheme. One marking point: “The habitat is B” …