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Questions and Answers
What is the shape of a Volvox colony?
What is the shape of a Volvox colony?
- Pyramidal
- Cylindrical
- Spherical (correct)
- Conical
Which of the following is true about Volvox?
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?
What is the name of the family to which Volvox belongs?
- Chlorophyceae
- Chlamydomonadales
- Volvocaceae (correct)
- Phylum Chlorophyta
Who first reported the existence of Volvox?
Who first reported the existence of Volvox?
What is the composition of the mucilaginous sheath that covers a Volvox colony?
What is the composition of the mucilaginous sheath that covers a Volvox colony?
What is the process called when the pointed end of Volvox colony is directed towards the anterior end due to inversion?
What is the process called when the pointed end of Volvox colony is directed towards the anterior end due to inversion?
What is the name of the type of sexual reproduction in Volvox?
What is the name of the type of sexual reproduction in Volvox?
What happens to the daughter colony after it is formed in Volvox asexual reproduction?
What happens to the daughter colony after it is formed in Volvox asexual reproduction?
What is the characteristic of monoecious Volvox species?
What is the characteristic of monoecious Volvox species?
What is the purpose of the gelatinous sheath around each cell in Volvox asexual reproduction?
What is the purpose of the gelatinous sheath around each cell in Volvox asexual reproduction?
What is the function of the flagella in Volvox colonies?
What is the function of the flagella in Volvox colonies?
What is the dominant phase in Volvox's life cycle?
What is the dominant phase in Volvox's life cycle?
What is a gonidia in Volvox?
What is a gonidia in Volvox?
What is the plakea stage in Volvox's asexual reproduction?
What is the plakea stage in Volvox's asexual reproduction?
What is the potential harm of rapid multiplication of V. aureus in a pond?
What is the potential harm of rapid multiplication of V. aureus in a pond?
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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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