Algae As Food
Algae are rich in carbohydrates, many inorganic and organic compounds, proteins, vitamins, etc. In some of the algae these substances are found in large amounts and are, therefore, used as food.
Algae
Benefits Of Algae
Algae are rich in carbohydrates, many inorganic and organic compounds, proteins, vitamins, etc. In some of the algae these substances are found in large amounts and are, therefore, used as food.
Economic Importance Of Algae
Algae are useful as food, in industries, in agriculture, as medicine, source of minerals, etc. At the same time production of water blooms, toxicity, etc., are some of their harmful effects.
Why Algae Is So Important
it clear that the United States can no longer ignore the threats to its economy, climate and national energy security rising from its dependence on petroleum fuel.
What Is Aplanogamy
Most of the algae reproduce by flagellated gametes (planogametes). However,in some algae like Spirogyra, diatoms, etc., Gametes lack flagella and are called aplanogametes.
What Is Oogamy
The male gamete is smaller and flagellated while the female gamete 1s larger and non-flagellated and thus passive. The male and female gametes are produced in specialised structures called antheridia and oogonia respectively. Oogamy is found in Oedogonium, Vaucheria, etc.
What Is Anisogamy
flagellated and motile. The male gamete is smaller in size and invariably more active than the female e.g., Caulerpa, etc.
What Is Isogamy
Both the motile gametes are Similar in shape, size and structure, i.e., they are morphologically similar, e.g., Ulothrix, etc.
What Is Plasmogamy
In this type, either both gametes or at least one is flagellated and. therefore, motile. Plasmogamy is of following types…
Describe Sexual Reproduction Of Algae
It involves formation of haploid gametes which fuse to form a diploid Zygote. Meiosis occurs during germination Zygote and the resultant new plant is a haploid gametophyte.
Sexual Reproduction Of Algae
It involves formation of haploid gametes which fuse to form a diploid Zygote. Meiosis occurs during germination Zygote and the resultant new plant is a haploid gametophyte.
Other Structures Of Algae
Many different types of asexual spores, other than those described above, are found in algae. Some of them are endospores in
What Is Akinete
These are non-motile spores with a very thick wall which remains fused with the wall of the parent cell. It contains a large amount of food material. In blue-green algae reserves (Cyanophyceae), akinetes are the major organs of reproduction.
What Is Autospores
These are formed due to the division of the contents of the parent cell into many segments, each of them resembling the parent cell. Each autospore is surrounded by a distinct cell wall; e.g., Chlorella, etc.
What Is Palmella Stage
It is a structure consisting of a large mucilage in which many non-motile cells are embedded. Palmella stage develops as a result of repeated divisions of the cells and concurrent dissolution of parent cell wall
What Is Hypnospores
This is a type of aplanospore with a very thick wall. This permits the spore to remain dormant for a long time under unfavourable conditions; e.g., Vaucheria, etc.
What Is Aplanospores?
These are non-motile spores and could be called zoospores arrested in their development. During their development, the units of protoplasm of the sporangium get enveloped by a new cell membrane just before zoospores could develop flagella; e.g., Ulothrix.
What Is Zoospores?
This is the most common method of asexual reproduction. Zoospores are uni-, bi, quadri- or multiflagellate asexual spores. The cell in which zoospores are formed is known as zoosporangium.
What Is Asexual Reproduction Of Algae
So Many small algae reproduce asexually by ordinary cell division or by fragmentation………….
What Is Asexual Reproduction
he cells taking part in reproduction undergo changes to form typical structures which germinate to give rise to a new plant. Asexual reproduction is characterised by