Concept & Use of a Classification System (Cambridge O Level Biology)

The animal in Fig. 1 is a chimpanzee.

Fig. 1

The chimpanzee is a vertebrate. 

State the main group of vertebrates to which the chimpanzee belongs. 

[1]

State two features, visible in Fig. 1, which suggest that it belongs to this group of vertebrates.

The binomial system of naming species gives chimpanzees the name Pan troglodytes.

Describe what is meant by the binomial system of naming species.

Chimpanzees are classified taxonomically as a single species, Pan troglodytes.

Define what is meant by the term species. 

Fig. 1

Describe the common features of arachnids visible in Fig. 1.

[1]

Dichotomous keys can be used to help classify organisms. 

Explain the purpose of classification systems. 

Dichotomous keys can be used to identify organisms based on a series of questions about their features.

Fig. 1 shows a group of leaves. 

Fig. 1

Suggest a dichotomous key for the leaves shown in Fig. 1 by completing Table 1. An example has been done for you. 

Table 1

Fig. 2 shows a different type of dichotomous key where invertebrates are classified. 

Fig. 2

Complete the dichotomous key to show the classification of arthropods into their four sub groups. 

Fig. 3 shows a range of different plants. 

Fig. 3

Give the type of plant, (monocotyledons, dicotyledons or ferns) for each plant labelled A-F.

[3]

Describe the evidence shown in Fig. 3 that informed your answer for plant F.

[1]