Definition of macrandrous. : having oogonia and antheridia borne on the same plant or on plants of similar size and form —used of green algae of the family Oedogoniaceae — compare nannandrous.
What are CAP cells?
cap cell. A cell, seen in filaments of algae in the order Oedogoniales, that has one to several ‘caps’ of cell wall material at its anterior end. These result from a distinctive form of cell division that involves the formation of rings of new cell wall material prior to nuclear division.
Are algae plants?
Algae are in the plant kingdom, but technically they are not plants. Algae range in size from microscopic to meters long and from single-celled to complex organisms that rival large plants. These organisms may look like true plants, but unlike plants, algae do not have roots or true stems and leaves.
Is Oedogonium unicellular or multicellular?
Those in class Charophyceae, a paraphyletic lineage, are unicellular or multicellular and live in freshwater or brackish water.
What is the name of basal cell in Oedogonium?
Out of about 400 species more than 200 have been reported from India. They are very common in pools, ponds, lakes etc. The filamentous plant body may get attached with the stone, wood, leaves of aquatic plants, small branches of dead plant remain in water etc. by their basal cell the holdfast.
What is apical cap in algae?
Definition of apical cap. : one of a series of bands resembling collars formed at the ends of the cells of green algae of the genus Oedogonium as a result of cell divisions.
What is Synzoospore?
Share. Answer. In Vaucheria, the multiflagellate compound zoospores also known as synzoospores or coenozoospores are developed in these genus usually in aquatic forms. A single compound zoospore develops in a single zoosporangium. Any distal branch of the thallus may convert into a zoosporangium.
Hereof, what is Nannandrous?
Definition of nannandrous. : having oogonia borne on normal-sized plants and antheridia borne on greatly reduced plants or filaments —used of green algae of the family Oedogoniaceae — compare macrandrous.
Where is Oedogonium found?
Oedogonium, genus of filamentous green algae (family Oedogoniaceae), commonly found in quiet bodies of fresh water. They often are attached to other plants or exist as a free-floating mass. Oedogonium filaments are typically unbranched and only one cell thick.
In this manner, what is meant by Macrandrous species in Oedogonium?
Sexual reproduction in Oedogonium is oogamous; and can be monoecious or dioecious. Species may either be macrandrous (lacking dwarf males) or nannandrous (possessing dwarf males). Dwarf males are small, short, antheridium-producing filaments attached near the oogonia (female sex organ).
What is Palmella stage?
Definition of palmella stage. : a colonial aggregate of immobile nonflagellated individuals occurring regularly in the life cycle or in response to increased firmness of medium of some flagellated green algae or plantlike flagellates (as members of the genera Euglena and Chlamydomonas)
What is the life cycle of Volvox?
Haploid life cycle occurs in green algae. Volvox, for example is a colonial green algae in which both male gametes and egg are produced in the 1n stage, which then fuse together to form a zygospore, an encysted zygote that is protected from the harsh conditions of the environment.
Is Ulothrix unicellular or multicellular?
ADVERTISEMENTS: The thallus of Ulothrix is filamentous, long, unbranched and multicellular, where the cells are arranged in a single row (i.e., uniseriate).
Is Oedogonium Isogamous or Heterogamous?
In this series you will study two species in two genera: Ulothrix, which is isogamous, and Oedogonium, which is heterogamous.
What is Meiozoospores?
In Oomycota. …of asexual reproductive cells, called zoospores. Zoospores move through the use of one or two whiplike swimming structures known as flagella, and individuals may germinate from these spores.
Additionally, what is a Suffultory cell?
An oogonium is a spherical, uninucleate structure, which contains an egg (Fig. 28). 4. Below each oogonium, a slightly elongated or cylindrical cell is present. It is known as supporting cell or suffultory cell.
What is the shape of chloroplast in Oedogonium?
In Oedogonium algae, reticulate shaped chloroplasts are found. Chloroplasts are one of very significant organs of a producer organism.
What is the name of the round structure of Oedogonium?
The terminal cell of the filament called apical cell. It is round or dome shaped. In some species e.g., O. ciliata, the apical cell is tapering and gives rise to narrow hair like structure.
Why are algae not considered plants?
Why are algae considered plant-like? The main reason is that they contain chloroplasts and produce food through photosynthesis. However, they lack many other structures of true plants. For example, algae do not have roots, stems, or leaves.