IB BIO TOPIC 5.5 : CLASSIFICATION

Question 1

Outline the binomial system of nomenclature

Answer 1

The binomial system of nomenclature was devised by Carolus Linnaeus as a way of classifying organisms that was globally recognised and could demonstrate evolutionary relationships between organisms (and thus allow for the prediction of features closely related organisms may share)

Question 2

According to the bionmial system of nomenclature every organism is designated a scientific name with two parts:

Answer 2

Genus is written first and is capitalised (e.g. Homo)
Species follows and is written in lower case (e.g. Homo sapiens)
Some species may also have a sub-species designation (e.g. Homo sapiens sapiens)
Conventions: When typing, the name should be in italics; whereas when hand writing, it should be underlined

Question 3

List the seven levels in the hierarchy of taxa

Answer 3

kingdom, phylum, class, order, family, genus and species

Mnemotic : King Phillip Comes Over For Great Sex

Question 5

List two examples of Kingdom

Answer 5

Animalia, Plantae

Question 6

List two examples of Phylum

Answer 6

Chordata, Angiospermophyta

Question 7

List two examples of Class

Answer 7

Mammalia, Dicotyledoneae

Question 8

List two examples of Order

Answer 8

Primates, ranales

Question 9

List two examples of Family

Answer 9

Himinidae, ranunculacae

Question 10

List two examples of Genus

Answer 10

Homo, Ranunculus

Question 11

List two examples of specie

Answer 11

sapiens, acris

Question 12

Distinguish between the following phyla of plants, using simple external recognition features: bryophyta, filicinophyta, coniferophyta and angiospermophyta

Answer 12

Question 13

Describe and observe each of these plants :

bryophyta, filicinophyta, coniferophyta and angiospermophyta

Answer 13

Question 14

Distinguish between the following phyla of animals, using simple external recognition features: porifera, cnidaria, platyhemlnthes, annelida, mollusca and arthropoda

Answer 14

Question 15

Give visual description and examples for each of these phyla animals :porifera, cnidaria, platyhemlnthes, annelida, mollusca and arthropoda

Answer 15

Question 16

What is a Dichotomous Key ?

Answer 16

A dichotomous key is a method of identification whereby a group of organisms are sequentially divided into two categories until all are identified