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Algae – Definition, Characteristics, Types and Examples

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Green growth is a general class of eukaryotic living beings that contains a few distinct animal types, from very basic ones to surprisingly complex animals. Beforehand, cyanobacteria (blue-green growth) were set in a different realm through and through (Monera) by virtue of them being prokaryotes, but since they are likewise photosynthetic (phototrophic), numerous researchers believe them to be a piece of green growth. Every one of the animal varieties in this classification, in any case, shares a few normal elements. These include:

  • Event of the photosynthetic color chlorophyll also different shades like carotenoids and phycobilin.
  • The capacity to do photosynthesis and produce oxygen (oxygenic) because of it.
  • The capacity to live in damp, oceanic conditions (some green growth is earthly also).
  • Starch-rich cell wall.
  • Presence of plastid (chloroplast).
  • The saved food is put away as starch and oils.
  • The word green growth has been gotten from the Latin word alga, and that implies kelp. In spite of the fact that ocean growth is likewise a piece of this classification, there are different kinds of examples that make up this gathering. In spite of being considered as plants, green growth is not quite the same as evident plants.

As referenced previously, green growth can be very basic creatures or strikingly perplexing. The easiest of green growth are unicellular, minuscule creatures, while the most complicated of algal examples incorporate the multicellular, fundamentally intricate, brown, and red-green growth. Notwithstanding, for each algal living being, every cell is equipped for creating another organic entity all alone.



Characteristics of Algae

All algal species share specific highlights that put them aside from other eukaryotic life forms. These attributes include:

  • Event of the photosynthetic shade chlorophyll as well as different colors like carotenoids and phycobilin.
  • The capacity to do photosynthesis.
  • They are for the most part tracked down in sea-going natural surroundings (freshwater, seawater, damp soil, and so on).
  • Sugar-rich cell wall.
  • Presence of chloroplast.
  • Hold food is put away as starch and oils.
  • The gametophyte is in the haploid stage, while the sporophyte is in the diploid stage. The two ages are autonomous of one another. The diploid stage, as a rule, is shaped just after treatment, and quickly goes through meiosis to frame haploid cells. No incipient organism development happens.
  • Green growth is a photosynthetic creature and can make its own food (energy-rich natural material) from inorganic material. In this way, the climate that is generally reasonable for algal development contains a lot of inorganic material that can be ingested by the algal cells and changed over completely to natural material. It is consequently that green growth fills best in amphibian conditions like lakes, lakes, waterways, and so forth which contain manures as run-off from yards, ranches, and streets from adjacent human settlements. Green growth can fill in sluggish water and since they are reliant upon photosynthesis, they can’t fill in locales of water bodies that don’t get a sufficient measure of light.

Types of Algae

There are many sorts of green growth. In any case, these are a portion of the more conspicuous sorts:

Red Algae

Likewise called Rhodophyta, it is a particular animal type tracked down in marine as well as freshwater biological systems. The colors phycocyanin and phycoerythrin are answerable for the trademark red coloration of the green growth. Different shades that give green coloration, (for example, chlorophyll a) are available. Nonetheless, they need chlorophyll b or beta-carotene.

Green Algae

It is an enormous, casual gathering of green growth having the essential photosynthetic colors chlorophyll an and b, alongside helper shades like xanthophylls and beta carotene. Higher organic entities utilize green growth to lead to photosynthesis for them. Different types of green growth have a cooperative relationship with different creatures. Individuals are unicellular, multicellular, pilgrims, and flogs. Unmistakable instances of green growth incorporate Spirogyra, Ulothrix, Volvox, and so on.

Blue-Green Algae

Before, blue-green growth was one of the most notable kinds of green growth. In any case, since blue-green growth is prokaryotes, they are not right now included under green growth (since all green growth are named eukaryotic organic entities). Additionally called cyanobacteria, these organic entities live in wet or sea-going conditions very much like other green growth. These incorporate dams, streams, supplies, brooks, lakes, and seas. This class of microbes acquires energy through the course of photosynthesis. Naturally, a few types of blue-green growth are vital for the climate as it fixes the nitrogen in the dirt. Consequently, these are likewise called nitrogen-fixing microbes. For example Nostoc, Anabaena, and so on.

Examples of Algae

  • Ulothrix
  • Fucus
  • Porphyra
  • Spirogyra

Conceptual Questions

Question1: What are the 3 main classifications of algae?


Algae are primarily classified into the following types:

  • Blue-green Algae.
  • Red Algae.
  • Green Algae.

Question 2: What is the scientific name for algae?


The algae are additionally assembled into different phyla and the postfix – phyta is utilized in the characterization of green growth: Euglenophyta (euglenoids), Chrysophyta (diatoms), Pyrrophyta (dinoflagellates), Chlorophyta (green growth), Phaeophyta (earthy colored green growth), and Rhodophyta (red-green growth).

Question 3. Does green growth create oxygen?


Like most plants, numerous green growth produces oxygen during the light as a result of photosynthesis. Around evening time these green growths consume oxygen, however typically substantially less than was delivered during the light.

Question 4: What do algae consume?


Like some other plants, algae, while developed utilizing daylight, consume (or ingest) carbon dioxide (CO2) as they develop, delivering oxygen (O2) until the end of us to relax.

Question 5: Do algae photosynthesize?


Algae are a different gathering of dominatingly oceanic photosynthetic life forms, including cyanobacteria, green growth, and other eukaryotic green growth. They represent over half of the photosynthesis that happens on Earth.

Question 6: Which are the smallest algae?


The worldwide meaning of microorganisms is a result of their cosmic numbers. This is positively valid for the littlest planktonic green growth on the planet, which are under 3 μm in width and the most various eukaryotic organic entities of the seas.

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Last Updated : 04 Jul, 2022
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