Algae: morphological organizational levels

Question 1

Answer 1

• vegetative flagellate cell
• unicellular flagellate
• monadoid level

Question 2

thallus forms

Answer 2

Question 3

Answer 3

• vegetative non-flagellate cell
• palmelloid aggregations
• tetrasporal level
• cells separated but enclosed within common mucilaginous envelope

“palmelloid” refers to their morphology, resembling a mass of cells that are closely packed togethe

Question 4

Answer 4

• vegetative flagellate cell
• colonial flagellate cells
• cells can be in direct contact or joined by a mucilaginous sheath

Question 5

Answer 5

• vegetative non-flagellate cell
• coccoid cells and non-flagellate colonies
• Single or aggregated cells in regular shaped colonies: COENOBIUM

Coccoid algae are single-celled organisms that typically have a spherical or nearly spherical shape

Question 6

Coenobium

Answer 6

A coenobium (plural: coenobia) refers to a specific type of colony found in certain groups of algae, particularly in some species of green algae (Chlorophyta) and cyanobacteria (formerly known as blue-green algae). Coenobia are characterized by the aggregation of multiple individual cells or organisms, which remain attached to each other and function as a collective unit.

A coenobium is composed of multiple individual cells or organisms that remain attached to each other and function as a collective unit. It is not a single organism but rather a colony formed by the aggregation of multiple cells or individuals

Question 7

Answer 7

• vegetative non-flagellate cell
• filaments (trichal level)
• multiseriate filaments in Rhodophyta
• “Multiseriate” literally means “having multiple rows” or “arranged in several rows.”

In the context of algae or plants, a multiseriate arrangement typically refers to a structure composed of cells arranged in several layers or rows, one on top of the other.

Question 8

Answer 8

• vegetative non-flagellate cell
• filaments (trichal level)
• uniseriate filaments

Question 9

Answer 9

• vegetative non-flagellate cell
• filaments (trichal level)
• branched

Question 10

Answer 10

• vegetative non-flagellate cell
• filaments (trichal level)
• unbranched

Question 11

Answer 11

• vegetative non-flagellate cell
• heterotrichous filaments (trichal level)

Question 12

Answer 12

• vegetative non-flagellate cell
• filaments (trichal level)
• pseudoparenchymatic thallus

Question 13

parenchymatous vs pseudoparenchymatous

Answer 13

Question 14

Answer 14

• vegetative non-flagellate cell
• parenchymatous thallus

Question 15

Answer 15

• vegetative non-flagellate cell
• parenchymatous thallus

Question 16

Answer 16

• vegetative non-flagellate cell
• siphonous thallus–> NO cytodieresis (Eindeutige Teilung de Zelle)

Question 17

Answer 17

• vegetative non-flagellate cell
• siphonocladous thallus

-siphonous–> no cytodieresis
- siphinocladous –> delayed dytodieresis (cladophyllous –> branching from)