In green algae, a heterotrichous habit is the most highly developed type of habit. Complete Answer: Heterotrichy means plants, namely prostrate branches and erect branches that produce two types of branches. The erect filament system arises in the plant body from the prostate filament system.
What is Heterotrichous thallus in algae?
Heterotrichous is a type of plant body, especially an algae thallus that is differentiated into two different systems: a prostrate system and an erect system. … Thus, when considering the whole thallus or plant body, one part is prostrate while the other part is upright.
What is Siphonaceous?
siphonaceous (siphoneous) Applied to algae in which the thallus is not divided up by septa, i.e. the many nuclei are not compartmentalized into cells. The typical siphónaceous alga has a large central vacuole surrounded by a layer of protoplasm, containing nuclei and chloroplasts, which lines the cell wall.
What is Pseudoparenchymatous?
pseudoparenchyma A tissue that superficially resembles plant parenchyma but is made up of an interwoven mass of hyphae (in fungi) or filaments (in algae). Examples of pseudoparenchymatous structures are the fruiting bodies (mushrooms, toadstools, etc.) of certain fungi and the thalli of certain red and brown algae.
What is meant by Aseptate?
aseptate. / (eɪˈsɛpteɪt) / adjective. biology not divided into cells or sections by septa.
Is the example of Siphonaceous thallus?
Siphonaceous:
This type of thallus organisation is made up of long, hollow tube-like structure called coenocyte. Such coenocytic filament have many nuclei and is branched. Example: Vaucheria, Botrydium, etc.
Can algae reproduce?
Algae regenerate by sexual reproduction, involving male and female gametes (sex cells), by asexual reproduction, or by both ways. … Many small algae reproduce asexually by ordinary cell division or by fragmentation, whereas larger algae reproduce by spores.
What is thallus in biology?
Thallus, plant body of algae, fungi, and other lower organisms formerly assigned to the obsolete group Thallophyta. A thallus is composed of filaments or plates of cells and ranges in size from a unicellular structure to a complex treelike form.
How many types of thallus are there?
Two types are recognised in the construction of the pseudoparenchymatous thallus. The body may have (1) a single colourless central axial filament (uniaxial construction) or (2) many filaments (multi-axial) around which photosynthetic filaments are supported (Fig. 12, 13).
Why Myxophyceae are called so?
Question : Blue green algae can also be called as myxophyceae. … The presence of mucilage around the thaIIus is characteristic feature of cyanobacteria group. 2. Therefore, this group is also called myxophyceae.
What is Pyrenoid in botany?
: a protein body in the chloroplasts of algae and hornworts that is involved in carbon fixation and starch formation and storage.
Can algae be blue?
What are blue-green algae? Though often referred to as algae, blue-green algae are not algae at all, but types of bacteria called cyanobacteria. They are normally present in bodies of water and common in Minnesota. This type of bacteria thrives in warm, nutrient-rich water.
Which algae shows a Heterotrichous plant habit?
Stigeoclonium shows heterotrichous habit which differentiated into prostrate and erect system.
What does Monosiphonous mean?
adjective. Botany. 1Of an algal stem or filament: composed of a single strand of large elongated cells. Of an alga: having filaments of this kind. 2Of a pollen grain: producing a single pollen tube during germination.
Is algae a plant or an animal?
Algae are photosynthetic creatures. They are neither plant, animal or fungi. Many algae are single celled, however some species are multicellular. Many, but not all of red and brown algae are multicellular.
Is algae bad or good?
Most algae are harmless and an important part of the natural ecosystem. Some types of algae produce toxins that can be harmful to people and animals. Where these harmful algae grow rapidly and accumulate in a water environment, it is known as a harmful algal bloom.
How quickly can algae grow?
Microalgae grow fast, and some can double in size in 24 hours. The other type of algae, macroalgae, are more commonly known as seaweed. They are fast-growing marine and freshwater plants that can grow to considerable size.
What is range of thallus?
Algal thallus ranges from unicellular to multicellular form and size ranges from a few microns to some meters. … The unicellular form constitutes a colonial structure when held together in a common gelatinous matrix, this is known as the intermediate stage of unicellular and multicellular structures.
Why is algae body called thallus?
The plant of an algae is called thallus because it is not differentiated into true root, ture stem and true leaves. The unicellular green algae-Chlamydomonas and Chlorella are placed in Kingdom-Plantae to explain the evoluntionary continuity between the green algae and the land plants.
What is Palmelloid?
palmelloid Applied to an algal colony composed of an indefinite number of non-motile cells embedded in a gelatinous or mucilaginous matrix. It may occur as a non-motile phase in a normally motile species. A Dictionary of Plant Sciences. “palmelloid .”
What is another word for Aseptate?
septum. (redirected from Aseptate)
What is Isogametes?
: a gamete indistinguishable in form or size or behavior from another gamete with which it can unite to form a zygote.
What does Multinucleate mean?
: having more than two nuclei a multinucleated macrophage multinucleated muscle fibers — compare binucleate, uninucleate.