Both motile and non-motile gametes are found. In Volvox and Fucus, oogamy is present, where non-motile egg fuses with motile sperm.
Does Volvox have motile gametes?
(I) In Volvox, sexual reproduction involves the fusion of one large , static male gemete and a smaller motile female gamete. (II) In spirogyra , fusing gametes are non-flagellated and dissimilar in size. … Fucus, the female gamete is large and non-motile whereas male gamete is small and motile .
Is Volvox non-motile?
Volvox is a spherical multicellular green alga, which contains many small biflagellate somatic cells and a few large, non-motile reproductive cells called gonidia, and swims with a characteristic rolling motion.
Which gamete is generally non-motile?
The larger gamete, or egg, is nonmotile; the smaller gamete, or sperm, is motile. The last type of gametic difference, egg and sperm, is often designated as oogamy. In oogamous reproduction, the union of sperm and egg is called fertilization.
How does Volvox reproduce?
Volvox reproduces asexually through the formation of autocolonies. Special gonidium cells divide to form daughter colonies that are small versions of the parents but with the flagella facing inwards. … Larger gonidia reproductive cells in the colony posterior give rise to the gametes and daughter colonies.
Which type of gametes are found in Volvox?
In sexual reproduction two types of gametes are produced. Volvox species can be monoecious or dioecious. Male colonies release numerous sperm packets, while in female colonies single cells enlarge to become oogametes, or eggs.
Are the gametes of Fucus Isogamous or Oogamous?
Such reproduction is called isogamous. Fusion of two gametes dissimilar in size, as in species of Eudorina is termed as anisogamous. Fusion between one large, non- motile (static) female gamete and a smaller, motile male gamete is termed oogamous, e.g., Volvox, Fucus.
Is Volvox colony made up of non-motile cells?
Statement 2 : Volvox colony is made up of non-motile cells.
Does Volvox forms spherical colony?
Volvox, genus of some 20 species of freshwater green algae (division Chlorophyta) found worldwide. Volvox form spherical or oval hollow colonies that contain some 500 to 60,000 cells embedded in a gelatinous wall and that are often just visible with the naked eye.
Is Volvox a colony?
Is Volvox colonial or multicellular? Volvox is a genus of colonial green algae. Thousands of cells together form colonies. There are around 500 to 60,000 cells in each colony of volvox.
Does Volvox show Isogamy?
Complete Answer: – In Isogamous mode of sexual reproduction, the structure, morphology and activity of the fusing gametes remains the same and it is not easy to differentiate which gamete is male and which female. … Volvox is facultatively sexual and the sexual reproduction type is Oogamous type.
Are gametes non-motile in blue green algae?
Option A Blue green algae: Blue green algae or Cyanophyceae reproduce through simple division or fragmentation or non-motile spores. … Option D Green algae: Green algae or Chlorophyceae reproduce by zoospores, which are motile asexual spores with two identical anterior flagella. So, their gametes are not non-motile.
What is motile and non-motile gametes?
motile- that have cilia like structures and can move…… non-motile- do not show any movement.
What characteristics do Volvox have in common with other protists?
Volvox are protists that live in colonies, or groups of organisms living together. They are both autotrophs and heterotrophs. They use their eyespot to detect light when they undergo photosynthesis. They also have tails, or flagella, they use to move the colony.
How do somatic and reproductive cells of Volvox differ in function?
How do somatic and reproductive cells of Volvox differ in function? Somatic cells are the vegetative photosynthetic ones and the reproductive one are differentiated to produce either sperm or eggs.
Why is Volvox considered as a model organism for Multicellularity?
Unlike Chlamydomonas unicells, Volvox somatic cells cannot divide, and this distinction is very important — Volvox has multicellularity with division of labor because its somatic cells lost the capacity for reproduction. Reproduction is carried out by a second type of specialized cell, called the gonidium.