Explanation

• Lewis Waterman invented the first practical fountain pen in 1884.
• He was an American inventor who improved the ink-feeding system.
• His design regulated ink flow and reduced leakage.
• The fountain pen stores ink in a reservoir and delivers it to the nib.

Last verified on 29-10-2026

Explanation

• James Chadwick is known for his discovery of the neutron in 1932.

Additional information:

• Proton: Protons were discovered by Ernest Rutherford, before neutrons.
• Electron: Electrons were discovered by J.J. Thomson, much earlier than protons or neutrons.
• Positron: A positron is the antiparticle of an electron, and it was discovered by Carl Anderson in 1932.

Last verified on 29-10-2026

Explanation

• The study of the structure of tissues of plants and animals is known as Histology.
• It involves examining the structure, composition, and function of cells and tissues under a microscope.
  

Additional information:

• Geology is the study of rocks and Earth's structure.
• Radiology is the study of medical imaging techniques like X-rays and MRI.

Last verified on 22-01-2026

Explanation

Tashkent Declaration

- Date: 10 January 1966

- Countries: India and Pakistan

- Purpose: To resolve the 1965 Indo-Pakistani War

- Type: Peace agreement

- Mediation: Soviet Union

- Pakistan’s President: Ayub Khan

- India’s Prime Minister: Lal Bahadur Shastri

- Location: Tashkent (now in Uzbekistan)

Last updated: 27 OCT 2026 

Explanation

- Date: 8 March every year

- Purpose: To celebrate women’s achievements and promote gender equality.

- First observance: 1911

- Observed worldwide: Every year on 8 March

- 2026 Theme: Rights. Justice. Action. For ALL Women and Girls.

Last updated: 27 OCT 2026 

Explanation

• Access Toolbar: Quick access to frequently used commands.
• Usually contains Save, Undo, and Redo.

Additional information:

• Standard Toolbar: Contains common commands such as New, Open, Save, and Print.
• Formatting Toolbar: Contains text formatting options such as font, size, bold, and alignment.

Last updated: 27 OCT 2026 

Explanation

• Start a presentation from the beginning: F5
• Start a presentation from the current slide: Shift + F5

Last verified on 01-09-2026

Explanation

The menu or tab used to change the font and style is the Home tab.

• MS Word manual font size (1-1638)
• Excel: 8-72(1-409)
• PowerPoint: 8-96(1-3600)

Last updated 27-07-2026 by NA

Explanation

• The largest political party in East Pakistan at the time of separation was the Awami League,
• Leader: Sheikh Mujibur Rahman.
• Victory: Won the most seats in the 1970 general elections.
• Separation: East Pakistan became Bangladesh in 1971.

Explanation

• The nucleolus is a dense region inside the nucleus where ribosomal RNA (rRNA) is produced and ribosomal subunits are assembled.
• Ribosomes are responsible for protein synthesis in the cell.

Last verified on 27-10-2026