Features of Organisms (Cambridge O Level Biology)

Scientists classify organisms into groups.

State one feature that is used to identify vertebrates.

Fig. 1 shows three vertebrates found in Australia.

Fig. 1

The emu, the saltwater crocodile and the duck-billed platypus each belong to a different vertebrate group.

All three animals lay eggs that develop and hatch on land.

State the name of the vertebrate group to which emus belong and give one feature of this group that is visible in Fig. 1.

[2]

State the name of the vertebrate group to which crocodiles belong and give one feature of this group that is visible in Fig. 1.

The duck-billed platypus is classified as a mammal.

Give evidence from Fig. 1 for and against classifying the duck-billed platypus as a mammal.

There are two groups of vertebrates which lay eggs that develop in water.

State the name of these two groups of vertebrates. 

Complete the sentences about kingdoms. 

Vertebrates belong the kingdom ____________.  All vertebrates have a ___________. There are _______ classes of vertebrates; one class is mammals.

There are four other kingdoms which include plants, ___________, ____________ and _____________.

Fig. 1

State one feature that can be used to classify an animal as an arthropod.

   [1]

 [2]

One of the drawings shows an arthropod named Araneus diadematus.

This arthropod has a body in two segments and it has eight legs.

State the letter of the organism in Fig. 1 that shows Araneus diadematus.

[1]

State the name of the group of arthropods that includes Araneus diadematus.

The phylum arthropods can be grouped into different classes. 

State how many classes are found within the phylum arthropod.

Organisms can be classified into groups by the features they share.

State two features used to classify humans as mammals. 

Humans may be infected with pathogens such as viruses. 

State the two main features of a virus.