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Which of the following is true about cyanobacteria (blue-green algae)?
- a)They are unicellular, colonial, or filamentous and are capable of nitrogen fixation in specialized cells called heterocysts.
- b)They are heterotrophic bacteria that obtain nutrients by consuming other organisms.
- c)They lack chlorophyll and are incapable of photosynthesis.
- d)They exclusively thrive in marine environments and are never found in freshwater.
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Which of the following is true about cyanobacteria (blue-green algae)?...
Cyanobacteria (also known as blue-green algae) are photosynthetic autotrophs and possess chlorophyll a, similar to green plants. They can be unicellular, colonial, or filamentous and are capable of nitrogen fixation in specialized cells called heterocysts, which helps in converting atmospheric nitrogen into a usable form for the ecosystem. They are found in both freshwater and marine environments.
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Which of the following is true about cyanobacteria (blue-green algae)?...
Overview of Cyanobacteria
Cyanobacteria, commonly known as blue-green algae, are a diverse group of photosynthetic bacteria that play crucial roles in aquatic ecosystems and nitrogen cycling.
Characteristics of Cyanobacteria
- Unicellular, Colonial, or Filamentous:
Cyanobacteria can exist as single cells, in colonies, or in filamentous structures. This versatility allows them to adapt to various environmental conditions.
- Nitrogen Fixation:
They have specialized cells known as heterocysts that enable them to fix atmospheric nitrogen into a usable form. This process is vital for enriching soil and water ecosystems.
Why Other Options are Incorrect
- Heterotrophic Nature:
Option B states that cyanobacteria are heterotrophic bacteria. This is false as they are primarily autotrophic, using sunlight to perform photosynthesis.
- Chlorophyll Presence:
Option C claims they lack chlorophyll, which is incorrect. Cyanobacteria contain chlorophyll a, enabling them to photosynthesize and produce oxygen.
- Habitat Limitations:
Option D asserts that they thrive exclusively in marine environments. In reality, cyanobacteria are found in various habitats, including freshwater, soil, and even extreme environments.
Conclusion
In summary, option A accurately describes cyanobacteria, highlighting their unicellular or filamentous nature and their ability to fix nitrogen in heterocysts. This makes them essential for both aquatic ecosystems and agricultural practices.
Cyanobacteria, commonly known as blue-green algae, are a diverse group of photosynthetic bacteria that play crucial roles in aquatic ecosystems and nitrogen cycling.
Characteristics of Cyanobacteria
- Unicellular, Colonial, or Filamentous:
Cyanobacteria can exist as single cells, in colonies, or in filamentous structures. This versatility allows them to adapt to various environmental conditions.
- Nitrogen Fixation:
They have specialized cells known as heterocysts that enable them to fix atmospheric nitrogen into a usable form. This process is vital for enriching soil and water ecosystems.
Why Other Options are Incorrect
- Heterotrophic Nature:
Option B states that cyanobacteria are heterotrophic bacteria. This is false as they are primarily autotrophic, using sunlight to perform photosynthesis.
- Chlorophyll Presence:
Option C claims they lack chlorophyll, which is incorrect. Cyanobacteria contain chlorophyll a, enabling them to photosynthesize and produce oxygen.
- Habitat Limitations:
Option D asserts that they thrive exclusively in marine environments. In reality, cyanobacteria are found in various habitats, including freshwater, soil, and even extreme environments.
Conclusion
In summary, option A accurately describes cyanobacteria, highlighting their unicellular or filamentous nature and their ability to fix nitrogen in heterocysts. This makes them essential for both aquatic ecosystems and agricultural practices.
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Which of the following is true about cyanobacteria (blue-green algae)?a)They are unicellular, colonial, or filamentous and are capable of nitrogen fixation in specialized cells called heterocysts.b)They are heterotrophic bacteria that obtain nutrients by consuming other organisms.c)They lack chlorophyll and are incapable of photosynthesis.d)They exclusively thrive in marine environments and are never found in freshwater.Correct answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following is true about cyanobacteria (blue-green algae)?a)They are unicellular, colonial, or filamentous and are capable of nitrogen fixation in specialized cells called heterocysts.b)They are heterotrophic bacteria that obtain nutrients by consuming other organisms.c)They lack chlorophyll and are incapable of photosynthesis.d)They exclusively thrive in marine environments and are never found in freshwater.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is true about cyanobacteria (blue-green algae)?a)They are unicellular, colonial, or filamentous and are capable of nitrogen fixation in specialized cells called heterocysts.b)They are heterotrophic bacteria that obtain nutrients by consuming other organisms.c)They lack chlorophyll and are incapable of photosynthesis.d)They exclusively thrive in marine environments and are never found in freshwater.Correct answer is option 'A'. Can you explain this answer?.
Which of the following is true about cyanobacteria (blue-green algae)?a)They are unicellular, colonial, or filamentous and are capable of nitrogen fixation in specialized cells called heterocysts.b)They are heterotrophic bacteria that obtain nutrients by consuming other organisms.c)They lack chlorophyll and are incapable of photosynthesis.d)They exclusively thrive in marine environments and are never found in freshwater.Correct answer is option 'A'. Can you explain this answer? for NEET 2025 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about Which of the following is true about cyanobacteria (blue-green algae)?a)They are unicellular, colonial, or filamentous and are capable of nitrogen fixation in specialized cells called heterocysts.b)They are heterotrophic bacteria that obtain nutrients by consuming other organisms.c)They lack chlorophyll and are incapable of photosynthesis.d)They exclusively thrive in marine environments and are never found in freshwater.Correct answer is option 'A'. Can you explain this answer? covers all topics & solutions for NEET 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following is true about cyanobacteria (blue-green algae)?a)They are unicellular, colonial, or filamentous and are capable of nitrogen fixation in specialized cells called heterocysts.b)They are heterotrophic bacteria that obtain nutrients by consuming other organisms.c)They lack chlorophyll and are incapable of photosynthesis.d)They exclusively thrive in marine environments and are never found in freshwater.Correct answer is option 'A'. Can you explain this answer?.
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