Exam-Style Questions: Classification
1. a) Define the following terms:
(i) Species.
(ii) Genus.
b) (i) Who devised the binomial system for naming organisms?
(ii) Why is this system useful for classification?
(Marks available: 4)
Answer outline and marking scheme for question: 1
Give yourself marks for mentioning any of the points below:
a) (i) All members of a species are capable of interbreeding to produce fertile offspring. A species will have a particular set of characteristics.
(ii) A genus is a group of similar or closely related species.
(2 marks)
b) (i) Carl von Linne/Linnaeus.
(ii) Closely related species are grouped together.
Latin is used so there is no language barrier, the organism only has one 'true' name.
(2 marks)
(Marks available: 4)
2. Define the following terms:
a) (i) Diploblastic.
(ii) Triploblastic.
b) Name two advantages that having a coelom gives an organism.
(Marks available: 4)
Answer outline and marking scheme for question: 2
Give yourself marks for mentioning any of the points below:
a) (i) An animal possessing 2 major tissue layers. These include the outer layer (the ectoderm) and the inner layer (the endoderm).
(ii) An animal possessing 3 major tissue layers. It has a middle layer (the mesoderm), between the endoderm and the ectoderm.
(2 marks)
b) Choose from:
It enables independent movement of the gut wall and the body wall.
It provides space of the enlargement and development of internal organs.
It may act as a circulatory medium for transport of materials or a storage area of excess or waste materials.
(2 marks)
(Marks available: 4)
3. a) What is phylogenetic classification?
b) List the five kingdoms and give an example of the type of organism belonging to each kingdom.
(Marks available: 6)
Answer outline and marking scheme for question: 3
Give yourself marks for mentioning any of the points below:
a) A system of classification that reflects the evolution of organisms.
(1 mark)
b) Monera: Bacteria/cyanobacteria
Protoctista: Algae/protozoa.
Fungi: Mould/yeast/mushrooms
Plantae: Angiosperms/ferns/conifers
Animalia: Sponges/flatworms/mammals
(5 marks)
(Marks available: 6)
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