Factors affecting the distribution of

Contents & notes: what this topic covers

Under Factors affecting the distribution of, the JAMB Biology syllabus expects you to study:

• 1. Factors affecting the distribution of Organisms i. Abiotic ii. Biotic

Study notes & guidance

Study Factors affecting the distribution of using a recommended Biology textbook that follows the JAMB syllabus. Work through the contents listed above one by one, make brief notes in your own words, and then practise as many questions on this topic as you can — in Biology, understanding and steady practice matter far more than memorising. Use the objectives below as a checklist: if you can do each one confidently, you have mastered this topic.

Objectives — candidates should be able to

After studying Factors affecting the distribution of, you should be able to:

1. Relate the effects of temperature; rainfall, relative humidity, wind speed and direction, altitude, salinity, turbidity, pH and edaphic (soil) conditions on the distribution of organisms.
2. Use appropriate equipment ( secchi disc, thermometer, rain gauge) to measure abiotic factors.
3. Describe how the activities of plants/animals (particularly human) affect the distribution of organisms.

These objectives are from the official JAMB syllabus. Use them as a checklist — if you can do each one confidently, you have mastered this topic.

Source: official JAMB UTME Biology syllabus (IBASS, jamb.gov.ng). Reproduced for study use. Last checked: 17 Sept 2026. Always confirm the current syllabus on the official portal.