Thallophyta Characteristics Quiz & Flashcards

Which characteristic is true for Thallophyta plants?

Which of the following algae have chlorophyll a and b type?

In Thallophyta, what type of reproduction involves the fusion of two gametes?

Which type of algae has zoospores absent?

What is the reserve food in Brown Algae?

Which of the following algae have cell walls containing algin?

What is the economic importance of Laminaria and Ascophyllum?

Which algae are mostly found in marine environments?

Volvox exhibits which type of sexual reproduction?

Thallophyta plants lack which of the following structures?

Thallophyta

Comprises simplest plants with undifferentiated or thallus-like forms and single reproductive organs called gametangia
Includes only algae

Characteristics of Algae

Plant body is thallus, which can be unicellular, colonial, filamentous, or parenchymatous
Vascular tissues and mechanical tissue are absent
Reproduction occurs through: • Vegetative fragmentation • Asexual spore formation (zoospores) • Sexual reproduction by fusion of two gametes

Types of Algae

Chlorophyceae (Green Algae) • Found in freshwater and subaerial environments • Chlorophyll a and b type • Reserve food is starch • Cell wall is of cellulose • Examples: Chlamydomonas, Ulothrix, Spirogyra
Phaeophyceae (Brown Algae) • Found in marine environments • Chlorophyll a and c type • Reserve food is laminarin • Cell wall contains cellulose and algin • Examples: Sargassum, Ectocarpus
Rhodophyceae (Red Algae) • Found in marine environments • Chlorophyll a and b type • Reserve food is floridean starch • Cell wall contains cellulose and poly-sulphate esters • Examples: Polysiphonia, Gelidium, Porphyra

Economic Importance of Algae

Used as food in some countries (e.g., Laminaria, Sargassum)
Rich source of iodine (e.g., Fungus, Laminaria)
Antibiotic properties (e.g., Laminaria, Ascophyllum)

Learn about Thallophyta, the simplest plants including algae, with undifferentiated forms and reproductive organs like gametangia. Explore the characteristics of algae, such as thallus structure and methods of reproduction.