26) Unit 2 - Identification and Taxonomy

Question 1

how can you identify a sample/organism

Answer 1

using:
•classification guides
•biological keys
•analysis of DNA or proteins

Question 2

what are the 3 domains of life

Answer 2

• Archea
• Bacteria
• Eukaryotes

Question 3

list the 5 major divisions of the plant kingdom

Answer 3

• mosses
• liverworts
• ferns
• gymnosperms
• angiosperms

Question 4

list the 5 major divisions of the animal kingdom

Answer 4

• chordata
• arthropoda
• nematoda
• platyhelminthes
• mollusca

Question 5

describe chordata

Answer 5

sea quirts and vertebrates

e.g birds, mammals, reptiles and fish

Question 6

describe arthropoda

Answer 6

• joint legged invertebrates
• segmented bodies
• paired appendages (legs etc)

Question 7

describe platyhelminthes

Answer 7

•flatworms
•show bilateral symmetry
•lack body cavities but do contain internal organs
(many are parasitic)

Question 8

describe mollusca

Answer 8

snails, octopus .. many have shells

Question 9

why are model organisms used

Answer 9

to obtain information about species which are more difficult to study

Question 10

list examples of model organisms and their taxonomic group

Answer 10

Chordates (mice, rats)

Arthropods (drosophila melanogaster)

Question 11

describe nematoda

Answer 11

•round worms

e.g tape worms