About Rachel Majaya

She holds a Bachelor of Science Honors in Applied Biology and Biochemistry from National University of Science and Technology, a Certificate in Good Clinical Practices from National Institute on Drug Abuse Clinical Trials Network, a Certificate in Leadership from Deloitte and Certificate in Chemistry Laboratory Experiments from Helsinki Metropolian University of Applied Sciences, Finland.

February 2025

Tourism Industry in Zimbabwe

By |2025-02-12T09:45:57+02:00February 12th, 2025|Notes, O Level Geography, Ordinary Level Notes|

Troutbeck in Nyanga. Image credit hotel-r.net

ZIMSEC O Level Geography Notes: Tourism Industry in Zimbabwe

  • Tourism has been the world’s fastest growing industry due to a number of factors.
  • This growth has been taking place in both developed and developing countries although growth rates have been varying between countries.
  • The greatest […]
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Biology Notes: Water and its properties: Density and heat fusion

By |2025-02-12T09:45:59+02:00February 12th, 2025|Notes, O Level Biology Notes, Ordinary Level Notes|

ZIMSEC O Level Biology Notes:Properties and Biological significance of water

Property: High heat of fusion

  • This is a measure of the heat energy required to melt a solid (ice).
  • Liquid water must lose a large amount of heat energy to freeze.

Biological role

  • Contents of cells and their environment are therefore less likely to freeze.
  • This is an advantage for bodies of […]
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Biology Notes: Water and its properties: Surface tension

By |2025-02-12T09:46:13+02:00February 12th, 2025|Notes, O Level Biology Notes, Ordinary Level Notes|

ZIMSEC O Level Biology Notes:Properties and Biological significance of water

Property: High surface tension and cohesion (adhesion and cohesion)

  • Cohesion is the force whereby individual molecules stick together.
  • Adhesion is the force whereby water molecules stick to other surfaces.

Biological role

  • Cohesion helps water to move as an unbroken column in the xylem tubes in plants.
  • Adhesion helps the water to stick […]
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