Cyanobacteria

Question 1

What habitats are Cyanobacteria found in?

Answer 1

-Deserts -Large colonies in lakes (grape like structures) -Hot springs (Yellowstone National park) -Antartica

Question 2

What are the four orders of Cyanobacteria?

Answer 2

-Nasto - cales -Chroo-coc-cales -Oscilla-tories -Stig-one-mata-les

Question 3

Name the four types of cell arrangements?

Answer 3

-Uni cellular -Colonial -Filaments -Branched

Question 4

The duplication of DNA and dividing in half is also known as?

Answer 4

Simple Cell Division

Question 5

Formation of smaller cells from larger ones is also known as?

Answer 5

Binary Fission

Question 6

Cells which break into fragments which then regenerate is also known as?

Answer 6

Fragmentation

Question 7

Resting spores which grow is a process known as?

Answer 7

Germination

Question 8

I have a filamentous structure with a sheath and heterocysts, which order of Cyanobacteria am I?

Answer 8

Nostocales

Question 9

I have a unicellular colonial structure, I’m never filamentous.

Answer 9

Chroo-cocc-ales

Question 10

I am fillamentous without akinetes of heterocysts

Answer 10

Oscilla-tories

Question 11

I have filamentous sheaths, heterocysts and I’m true branching, what am I?

Answer 11

Stig-one-mata-les

Question 12

Conversion of atmospheric nitrogen into ammonia for living organisms is known as?

Answer 12

Nitrogen fixation

Question 13

Heterocysts are specialised what?

Answer 13

Nitrogen fixing cells

Question 14

Draw and label the:

• Epilimnion
• Metalimnion (thermocline)
• Hypolimnion

Answer 14

Question 15

Draw a basic lake diagram and label the following zones:

• Littoral
• Pelagic
• Profundal

Answer 15

Question 16

List 4 optically active materials relevant to lake ecology?

Answer 16

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Question 17

What physical variables could you measure to define the locations of the horizontal and vertical white lines dividing the lake into zones?