Question

Choose the incorrect statement among the following

• A. Super Microbes are resistant to many drugs.
• B. Severe Acute Respiratory syndrome is a recently emerged disease.
• C. Cyanobacteria symbiotically associated with paddy fields as biofertiliser.
• D. Nucleo polyhedrovirus are species specific insecticide.

Hint:

When asked to identify an incorrect statement and all options appear true, re-examine the precise definitions of terms used. Sometimes, "incorrect" can imply "least accurate" or a statement that violates a very strict technical definition.

Answer 1

The Correct Option is C

Step 1: Analyze each statement carefully.
Statement (1): Super Microbes are resistant to many drugs.
This is true. Super microbes are genetically engineered or naturally evolved microorganisms that are resistant to multiple antibiotics. They are a concern in medical science due to their resistance to conventional treatments. Statement (2): Severe Acute Respiratory syndrome is a recently emerged disease.
This is also true. SARS first appeared in 2002–2003, and though not extremely recent, in the context of microbiology and disease emergence, it is classified as a recently emerged disease. Statement (3): Cyanobacteria symbiotically associated with paddy fields as biofertiliser.
This is incorrect. Cyanobacteria such as \textit{Anabaena} and \textit{Nostoc} are used as biofertilizers in paddy fields due to their nitrogen-fixing ability. However, they are not truly symbiotic. Symbiosis refers to a close and long-term biological interaction between two different organisms. In contrast, cyanobacteria in paddy fields are free-living and not in a symbiotic association with rice plants (unlike \textit{Rhizobium} in leguminous plants). Statement (4): Nucleo polyhedrovirus are species specific insecticide.
This is true. Nucleopolyhedroviruses belong to the Baculoviridae family and are used as biocontrol agents. They are highly species-specific, targeting only certain insect pests, making them environmentally friendly. Conclusion: The incorrect statement is (3).