Podcast
Questions and Answers
What is the characteristic of algae cell walls that is shared with other plant cells?
What is the characteristic of algae cell walls that is shared with other plant cells?
- Contain cellulose (correct)
- Contain chlorophyll
- Have a true nucleus
- Made of silica
What is the primary role of algae in aquatic ecosystems?
What is the primary role of algae in aquatic ecosystems?
- Producing oxygen and serving as a food source (correct)
- Regulating water temperature
- Decomposing organic matter
- Consuming small aquatic animals
Which type of algae is commonly used in sushi?
Which type of algae is commonly used in sushi?
- Yellow-Green Algae
- Brown Algae
- Green Algae
- Red Algae (correct)
What is a unique feature of Diatoms?
What is a unique feature of Diatoms?
What is one of the industrial uses of algae?
What is one of the industrial uses of algae?
What is the full form of EFB in biotechnology?
What is the full form of EFB in biotechnology?
Which two techniques enabled the birth of modern biotechnology?
Which two techniques enabled the birth of modern biotechnology?
What is the specific DNA sequence responsible for initiating replication?
What is the specific DNA sequence responsible for initiating replication?
What is an autonomously replicating circular extra-chromosomal DNA?
What is an autonomously replicating circular extra-chromosomal DNA?
Who are the scientists credited with the discovery of plasmids?
Who are the scientists credited with the discovery of plasmids?
What is the first recombinant DNA formed by?
What is the first recombinant DNA formed by?
What are restriction endonucleases also known as?
What are restriction endonucleases also known as?
What is the enzyme responsible for linking antibiotic resistance genes with plasmid vectors?
What is the enzyme responsible for linking antibiotic resistance genes with plasmid vectors?
What are the three basic steps in genetically modifying an organism?
What are the three basic steps in genetically modifying an organism?
What was the function of the two enzymes isolated in 1963?
What was the function of the two enzymes isolated in 1963?
Study Notes
Algae
Definition
- Algae are simple, aquatic, photosynthetic organisms that belong to the plant kingdom.
- They are eukaryotic, meaning their cells have a true nucleus.
Characteristics
- Algae are primarily aquatic, found in fresh, brackish, or saltwater environments.
- They can be unicellular or multicellular.
- They have cell walls containing cellulose, a characteristic shared with other plant cells.
- Algae have chloroplasts, which contain the pigment chlorophyll, responsible for photosynthesis.
Types of Algae
- Green Algae (Chlorophyta): most diverse group, includes seaweeds like spirulina and chlorella.
- Red Algae (Rhodophyta): includes dulse and nori, commonly used in sushi.
- Brown Algae (Phaeophyta): includes kelp and seaweed.
- Yellow-Green Algae (Xanthophyta): small group, includes species like vaucheria.
- Diatoms (Bacillariophyta): unique, glass-like cell walls made of silica.
Ecological Importance
- Algae are primary producers, providing oxygen and serving as a food source for aquatic animals.
- They contribute to aquatic ecosystems, influencing water quality and supporting marine biodiversity.
Economic Importance
- Algae are used as:
- Food sources (e.g., spirulina, nori).
- Fertilizers and animal feed.
- Thickeners and stabilizers in food products.
- Sources of biofuels and other industrial products.
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Description
Learn about the characteristics, types, and ecological and economic importance of algae, including their role in aquatic ecosystems and human uses. Discover the different types of algae, from green to red, brown, and yellow-green, and how they contribute to our environment and economy.
