Explanation

Ribosomes are manufactured and assembled in the nucleolus

The darkly staining region is called the nucleolus

Location: The nucleolus acts as the primary ribosome factory.

Process: rRNA genes are transcribed, combined with proteins, and assembled into subunits (40S and 60S in eukaryotes).

Explanation

The primary characteristic of local populations in the same area 

That they are conspecific—meaning they belong to the same species

Same species—and share a defined, contiguous geographic area,

Where they are more likely to interbreed with each other than with individuals from other areas

Last updated 17-02-2026

Explanation

Picric acid is also called 2,4,6-trinitrophenol.

It has three nitro (–NO₂) groups attached to a benzene ring with one hydroxyl (–OH) group.

     NO2

      |

 NO2—C6H2—OH

      |

     NO2

Explanation

Both gymnosperms and angiosperms are seed-producing plants (seed plants).

• Gymnosperms → Seeds are naked (not enclosed in fruit).

• Angiosperms → Seeds are enclosed within fruit.

Thus, they are correlated based on the characteristic of seed production.

Last updated 17-02-2026

Explanation

Ichthyology is the study of fish. 

It is a branch of zoology that deals with the biology, taxonomy, behavior, physiology, ecology, and anatomy of various fish species

Additional information:

• Agrostology: Study of Grasses 
• Agronomy: soil management and crop production 
• Odontology: study of teeth 
• Arthrology: Study of joints 
• Nephrology: study of kidneys
• Hematology: Study of blood  
• Dermatology:  Study of skin 

Last updated 17-02-2026

Explanation

• Olericulture is a branch of horticulture.
  • It focuses on the cultivation, growth, and harvesting of vegetables.
  • Helps improve yield, quality, and pest management in vegetables.
  • Important for food supply and nutrition.
  • Examples include tomatoes, carrots, and cabbage.

Last verified on 12-02-2026

Explanation

• Humidity means the amount of water vapor in air.
• It is measured using a psychrometer.
• A psychrometer has two thermometers: dry bulb and wet bulb.

Additional information:

• A psychrometer is a type of hygrometer.
• It helps in weather forecasting and climate studies.

Last verified on 12-02-2026

Explanation

• Arthropods are divided into different classes based on body structure, legs, and antennae.
• Spiders, ticks, and mites have eight legs and no antennae, which classifies them differently from insects.
• These belong to the class Arachnida.

Last verified on 11-02-2026

Explanation

• Chloroplast is the plant cell organelle that performs photosynthesis.
• It contains chlorophyll, the green pigment that captures sunlight to produce food (glucose) for the plant.

Additional information:

• Mitochondria: Powerhouse of the cell, produces energy via respiration
• Nucleus: Controls cell activities and stores DNA

Last verified on 11-02-2026

Explanation

Boiling milk is primarily a method of preservation

Because the high heat kills harmful bacteria and microorganisms that cause spoilage.

By destroying these pathogens,

The milk's shelf life is extended, making it safe for consumption for a longer period.