Blue Green Algae

Question 1

Divison

Answer 1

Cyanophyta or Cyanobacteria

Question 2

Class

Answer 2

Cyanophyceae

Question 3

Characteristics

Answer 3

Pigment: Chlorophyl a and phycoblins (B carotene and Xanthophyll)
No flagella

Question 4

Ultrastructure

Answer 4

prokaryotic (no true nucleus)

Question 5

Stromatolites

Answer 5

fossil forms of blue/green algae thought to be responsible for the accumulation of oxygen in the earth’s atm

Question 6

Ubiquitous

Answer 6

grows everywhere

Question 7

Water/Algae Bloom

Answer 7

growth in abundance to the point of water discoloration

Question 8

Pseudovacuoles

Answer 8

gas-filled, keeps algae floating during water blooms

Question 9

Gelatinous matrix

Answer 9

visible or not

Question 10

Reproduction: Favorable Conditions

Answer 10

endospores (goes through mitosis) (cells get bigger)

Question 11

Reproduction: Unfavorable Conditions

Answer 11

exospores or akinetes (creates a thick cell wall)

Question 12

Akinete

Answer 12

developed spore made up of one vegetative cell with food reserves and a hardened outer membrane

Question 13

Heterocyst

Answer 13

nitrogen fixation (makes nitrogen usable for green plants)

Question 14

Nitrogen in the air

Answer 14

78%

Question 15

Oxygen in the air

Answer 15

21%

Question 16

Most important n-fixers are bacteria that reside or live on legume root nodules

Answer 16

• root provides glucose and nutrients of bacteria

- bacteria provides ammonia (used in amino acids and peptide bonds for building proteins)

Question 17

NH3 is fixed into NO2 by

Answer 17

bacteria that decay urine, feces, and dead bodies