Question

Define Algae?????????????

Answer 1

Algae are a diverse group of aquatic organisms that have the ability to conduct photosynthesis.

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Answer 2

Answer :

Algae -

• It is a simple, autotrophic, thalloid and chlorophyll bearing organism.
• It is an aquatic organism.
• They mostly live in moist conditions.
• Some of them occur in association with fungi and animals.
• The form and size is highly variable.
• It can be found in microscopic unicellular form like chlamydomonas.
• It can also be found in colonial form like volvox.
• It can also be found in filamentous form like ulothrix and Spirogyra.

Reproduction -

• It can reproduce in three ways that is vegetative reproduction, asexual reproduction and sexual reproduction.
• In vegetative type of reproduction, fragmentation occurs. The body is divided into fragments which develops into a thallus.
• In asexual reproduction production of sports occur. Example - Zoospores. These flagellated and motile and germinate to give rise to new plants.
• In sexual reproduction, fusion of two garments occurs. There are 3 types; isogamous, anisogamous, and oogamous.
• Isogamous is the fusion of gametes which are similar in size and they can be flagellated or non flagellated. If they are flagellated they are motile (Like : Ulothrix) and if they are non flagellated they are non motile (Like : Spirogyra).
• Anisogamous is the fusion of gametes of dissimilar size which are flagellated. Like, Eudornia.
• Oogamous is the fusion between one large non motile female gamete and a smaller motile male gamete. Like, Volvox and Fucus.