Frequent question: Which gametes are motile in algae?

Which of the gametes are motile?

Gametes are an organism’s reproductive cells. … Each sperm cell, or spermatozoon, is small and motile. The spermatozoon has a flagellum, which is a tail-shaped structure that allows the cell to propel and move. In contrast, each egg cell, or ovum, is relatively large and non-motile.

In which algae and fungi both gametes are motile?

In some species of fungi and algae, female and male gametes are motile and almost identical. Higher animals, plants, and some species of fungi and algae show a particular type of anisogamy known as oogamy. In oogamy, the female gamete is much larger than the male sex cell, and it is non-motile.

Which algae has non-motile gametes?

Option B Red algae: Naturally red algae or Rhodophyceae have a thick and gelatinous cell wall. They lack flagella. The hormogonia of some species are able to move by gliding along surfaces. But, they are characterized by the absence of motile spores or gametes.

Which algae produce motile male gametes?

Among the brown algae, some forms, such as the filamentous Ectocarpus, have equal-sized biflagellate motile gametes. The large brown seaweeds, exemplified by the genera Laminaria and Fucus and their allies, have nonmotile free-floating ova and motile sperm (called antherozoids).

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In which plants male gametes are motile?

Riccia, Dryopteris and Cycas.

Which of the gametes the male or female is motile?

Oogamy: in humans and mammals, one of the gametes, male gamete or sperm, is motile and the other gamete, egg, or female gamete is non-motile. This condition is known as oogamy, wherein a large non-motile egg is fertilized or will fuse with a small and motile sperm to form the zygote.

Do red algae have motile male gametes?

Red algae happen to represent a slight variation of oogamy in that they actually have both non-motile male and female gametes.

Does porphyra have motile gametes?

Porphyra displays a heteromorphic alternation of generations. The thallus we see is the haploid generation; it can reproduce asexually by forming spores which grow to replicate the original thallus. … The female gametes while still on the thallus are fertilized by the released male gametes, which are non-motile.

Is male gamete motile?

The non-flagellated male gamete is free and vigorously motile, propelled by pseudopodia.