Page 5 - ACE YR IGCSE A TOP APPROACH TO BIO

Clone May / June 2010 10 The diagram shows the leaf of a plant
species.
9 The diagram shows a plant species. Use the
dichotomous key to identify the plant
species and choose the correct answer.

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Use the dichotomous key to identify the
plant species and choose the correct
answer.
1. leaf with large leaf blade ............. go to 2
1. flowers with four petals .......... go to 2 leaf with several small leaflets .... go to 3
flowers with five petals .............. go to 3 2. leaves with smooth edge ..................... A
2. leaves with smooth edge .................... A leaves with jagged edge ....................... B
leaves with jagged edge ...................... B 3. broad and flat leaves ............................ C
3. leaves with smooth edge .................... C narrow and long leaves ....................... D
leaves with jagged edge ...................... D

Part 2: Structured Questions
Answer all questions.

1 Fig. 1.1 shows a species of chordate, platypus, Ornithorhynchus anatinus.

Fig. 1.1

(a) (i) Which genus does Ornithorhynchus anatinus belong to?

[1]

(ii) Define the term vertebrates.

[1]

Chapter 1 Characteristics and Classification of Living Organisms 3

Chapter 1.indd 3 30/03/2022 3:07 PM