Paper 1 - Classification Of Organisms

Question 1

What are organisms in the animal kingdom like

Answer 1

• Multicellular (many cells arranged in tissues and organs)
• cells have nuclei
• no cell walls
• heterotroph (eat other organisms)

Question 2

What are organisms in the plant kingdom like

Answer 2

• multicellular
• cells have nuclei and chloroplasts
• cellulose cell walls
• autotroph (energy from photosynthesis)

Question 3

What are organisms like in the fungi kingdom

Answer 3

• multicellular (apart from yeasts)
• cells have nuclei
• chitin cell walls
• feed of dead matter

Question 4

What are organisms in the protist kingdom like ?

Answer 4

• mostly unicellular
• cells have nuclei
• some have cell walls (not chitin)

Question 5

What are organisms like in the prokaryote kingdom (including bacteria)

Answer 5

• unicellular
• no nucleus
• flexible cell wall

Question 6

Why was the 3 domain system produced ?

Answer 6

It was discovered after genetic analysis that organisms in the same kingdoms were very similar, so the 3 domain system was produced.

Question 7

Why did archea lead to development of the 3 domain system ?

Answer 7

Archea discovered and put into prokaryote kingdom because unicellular with no nucleus > after genetic analysis found to be very different to prokaryotes

Question 8

What are the 3 domains?

Answer 8

Archea (no nucleus, genes contain unused sections of DNA)
Bacteria (cells with no nucleus, genes contain no unused sections of DNA)
eukarya (nucleus, unused sections of DNA)

Question 9

Multicellular meaning

Answer 9

Cells are arranged in tissues and organs