Biology 0610 · IGCSE · Concept and uses of classification systems
Concept and uses of classification systems — practice question
Phytoplankton are made up of many species of single-celled algae and many-celled algae.
A student carried out an investigation into the species composition of the phytoplankton in a lake.
Fig. 1.1 shows some of the phytoplankton collected by the student.
(a)[1]
State the name of another kingdom that contains organisms with chloroplasts.
(b)[1]
Convert the true length of alga X to micrometres.
(c)[5]
Use the key to identify each species from A to G. Enter the letter for each species in the correct box beside the key.
(d)[3]
Describe the importance of phytoplankton in the food web of lake ecosystems.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Plants” …