Quiz_Botany

Explanation:W.M. Stanley was the first to crystallize the Tobacco Mosaic Virus (TMV), demonstrating that viruses could be purified and studied in a crystalline form. His work earned him the Nobel Prize in Chemistry.

Explanation:Nitrosomonas bacteria play a crucial role in the nitrogen cycle by converting ammonia (NH3) to nitrite (NO2-). This process is the first step in nitrification, which is essential for soil fertility.

Explanation:Nitrogen-fixing bacteria, such as Rhizobium and Azotobacter, convert atmospheric nitrogen (N₂) into ammonia (NH₃) or other nitrogenous compounds that plants can absorb and utilize. This process is vital for replenishing soil nitrogen content.

Explanation:Diseases can result from various factors including environmental conditions, mineral deficiencies, and pathogens, leading to abnormal states in organisms.

Explanation:India’s wide biodiversity is primarily due to its diverse ecological conditions, including various climates, altitudes, and habitats found in its hills, plains, forests, and coastal areas. This diversity supports a rich variety of flora and fauna.

Explanation:In mosses, the sporophyte develops from the fertilized egg within the archegonium, which is situated on the archegoniophore. This structure supports the female reproductive organs.

Explanation:The DNA of Escherichia coli (E. coli) is double-stranded and circular. This structure is typical of bacterial chromosomes and is different from the linear chromosomes found in eukaryotes.

Explanation:Microaerophilic bacteria require low levels of oxygen for growth. They thrive in environments where the oxygen concentration is lower than that in the atmosphere but still necessary for their metabolic processes.

Explanation:Lianas are woody climbers that use other structures for support as they grow upwards. They are distinct from twiners, climbers, and creepers, which have different growth habits.

Explanation:Meiosis is a type of cell division that reduces the chromosome number by half, resulting in the formation of haploid gametes (sperm and egg cells). This process is essential for sexual reproduction and genetic diversity.