How does Spirogyra locomotion?
Spirogyra filaments join together in mats along the surfaces of freshwater sources. They move towards light sources (which they need for photosynthesis) by bending, twisting and straightening their filaments.
What are the functions of the parts of a Spirogyra?
Answer. Spirogyra is also known as pond silk, as its filaments shine like silk due to the presence of mucilage. The outer cell wall has pectin which dissolves continuously, thereby producing the mucilage. Spirogyra filaments are slippery and float in large masses.
Does Spirogyra have flagellum?
Spirogyra has no flagella and cannot swim quickly as can They bear 2-10 spiral and ribbon-shaped chloroplasts with many pyrenoids.
What is the Locomotory organ of Spirogyra?
Answer: Spirogyra form long filaments, and it’s the bending and curving of these filaments that allow these protists to move, albeit slowly, to orient themselves towards light.
What is the function of cytoplasmic in Spirogyra?
Pyrenoid: The pyrenoid is a protein body within the chloroplast of the Spirogyra that helps with carbon fixation and the formation and storage of starches. It promotes photosynthetic carbon dioxide fixation. Cytoplasm: One of the most important functions of the cytoplasm is that it allows the cell to hold its shape.
Does Spirogyra have Zoospores?
No zoospores or cells with flagella are produced by Spirogyra. All algae are not filamentous. Thus, the correct answer is option C.
How does Spirogyra grow?
In spring Spirogyra grows under water, but when there is enough sunlight and warmth they produce large amounts of oxygen, adhering as bubbles between the tangled filaments. The filamentous masses come to the surface and become visible as slimy green mats.
Where is starch stored in spirogyra?
Each cell of the filaments features a large central vacuole, within which the nucleus is suspended by fine strands of cytoplasm. The chloroplasts form a spiral around the vacuole and have specialized bodies known as pyrenoids that store starch.
How does locomotion occur in protists?
In Protists, the important mechanism of locomotion is through the use of different structures such as pseudopodia, flagella, cilia, wriggling and locomotion through mucilage propulsion.
What do protists use for locomotion?
One of the most striking features of many protist species is the presence of some type of locomotory organelle, easily visible under a light microscope. A few forms can move by gliding or floating, although the vast majority move by means of “whips” or small “hairs” known as flagella or cilia, respectively.
How does Spirogyra reproduce?
Spirogyra species can reproduce both sexually and asexually. Asexual, or vegetative, reproduction occurs by simple fragmentation of the filaments. Sexual reproduction occurs by a process known as conjugation, in which cells of two filaments lying side by side are joined by outgrowths called conjugation tubes.
What is structure of Spirogyra?
The vegetative structure of Spirogyra is an unbranched filamentous thallus. The thallus is multicellular with each cylindrical cell joined end to end. They are 10-100 µm in width and may grow several centimetres in length. They are present as a slimy mass due to the presence of mucilage sheath around the filament.
Where are pyrenoids present in Spirogyra?
Chloroplast
So, the correct answer is “Chloroplast’.
What type of cell wall does Spirogyra have?
Spirogyra has long, unbranched filaments with cylindrical cells that are connected end to end. The cell wall is made up of an outer layer of pectin and an inner layer of cellulose. The inner surface of the cell wall is lined with a thin layer of cytoplasm.
How do Spirogyra move?
Spirogyra form long filaments, and it’s the bending and curving of these filaments that allow these protists to move, albeit slowly, to orient themselves towards light. And remember, they need light because they undergo photosynthesis.
What is the function of mucilage in Spirogyra?
Mucilage: The mucilage is the thick and sticky substance produced by the Spirogyra. Some microorganisms, including protists, are able to use this for locomotion. The direction of locomotion is typically opposite of where the secretion comes from. It plays a huge role in the storage of water, food, and germination.
What is the function of Spirogyra algae?
Spirogyra is commonly found in clean water and it produces food through the process of photosynthesis. Usually, spirogyra algae are seen as floating slimy masses, during summer.