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Discover the World of Volvox

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Questions and Answers

What is the shape of a Volvox colony?

Pyramidal

Cylindrical

Spherical (correct)

Conical

Which of the following is true about Volvox?

It is a multicellular organism

It forms colonies (correct)

It consists of only one species

It is a marine algae

What is the name of the family to which Volvox belongs?

Chlorophyceae

Chlamydomonadales

Volvocaceae (correct)

Phylum Chlorophyta

Who first reported the existence of Volvox?

Antony van Leeuwenhoek Signup and view all the answers

What is the composition of the mucilaginous sheath that covers a Volvox colony?

Glycoproteins Signup and view all the answers

What is the process called when the pointed end of Volvox colony is directed towards the anterior end due to inversion?

Inversion Signup and view all the answers

What is the name of the type of sexual reproduction in Volvox?

Oogamous reproduction Signup and view all the answers

What happens to the daughter colony after it is formed in Volvox asexual reproduction?

It remains attached to the parent colony Signup and view all the answers

What is the characteristic of monoecious Volvox species?

Both sex organs develop on the same plant Signup and view all the answers

What is the purpose of the gelatinous sheath around each cell in Volvox asexual reproduction?

To separate each cell Signup and view all the answers

What is the function of the flagella in Volvox colonies?

To facilitate movement in the water body Signup and view all the answers

What is the dominant phase in Volvox's life cycle?

Haploid (gametophyte) Signup and view all the answers

What is a gonidia in Volvox?

Cells that have lost their flagella and become enlarged and rounded Signup and view all the answers

What is the plakea stage in Volvox's asexual reproduction?

A stage where the gonidia divide longitudinally to form 8 cells arranged in a curved shape Signup and view all the answers

What is the potential harm of rapid multiplication of V. aureus in a pond?

Development of harmful algal blooms Signup and view all the answers

Study Notes

Shape and Classification of Volvox

Volvox colonies are typically spherical in shape.
Belongs to the family Volvocaceae.
First reported by the botanist Carl Friedrich Otto W. L. von M. H. L. Werdermann.

Structure and Reproduction

Covered by a mucilaginous sheath composed primarily of polysaccharides.
Inversion process occurs when the pointed end of a Volvox colony turns toward the anterior since the colony flips inside out.
Sexual reproduction type in Volvox is termed oogamy.

Asexual Reproduction and Characteristics

Daughter colonies remain within the parent colony until they are mature.
Monoecious species of Volvox possess both male and female reproductive organs in a single colony.
Gelatinous sheath around each cell supports structure and facilitates asexual reproduction.

Functionality and Life Cycle

Flagella in Volvox colonies function in locomotion and aid in the movement through water.
Dominant phase in the life cycle is the haploid phase.
Gonidia refers to the reproductive cells that develop into new colonies.

Stages of Development

Plakea stage in asexual reproduction is characterized by the early formation of daughter colonies within the parent structure.

Ecological Impact

Rapid multiplication of Volvox aureus in ponds can lead to oxygen depletion, potentially harming aquatic life.

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Description

Test your knowledge on the fascinating green algae, Volvox, with this quiz! Learn about the systematic position of Volvox in the Chlorophyta phylum, its thallus structure, and its freshwater habitat. Challenge yourself with questions on the Chlorophyceae class, Chlamydomonadales order, Volvocaceae family, and Volvox genus. Impress your friends with your newfound knowledge of this unique and intriguing algae.