Local (Nigerian) Biomes: JAMB Biology Questions, Answers & Notes

What Local (Nigerian) Biomes covers in the JAMB Biology syllabus

A biome is a large ecological zone defined by its climate and characteristic plants and animals. In Nigeria, rainfall decreases from south to north, giving a sequence of biomes: mangrove/swamp forest (salty coastal mud) and tropical rainforest (tall trees, highest rainfall and biodiversity) in the south; then Guinea savanna (tall grasses, borders the forest), Sudan savanna, and Sahel savanna (driest, far north); with montane forests on high plateaus. Savannas are grasslands with scattered trees supporting grazers. Climate (rainfall and temperature) and soil determine natural vegetation. The dry north is threatened by desertification, worsened by overgrazing and deforestation.

For Local (Nigerian) Biomes, JAMB expects you to be able to:

• Define a biome and identify the major Nigerian vegetation zones
• Relate biomes to climate (the rainfall gradient) and their plants/animals
• Explain threats such as desertification and biodiversity differences

Key facts & revision notes: Local (Nigerian) Biomes

These are the recurring points our Local (Nigerian) Biomes questions test — revise them until each feels automatic, then practise the questions above to lock them in.

• A biome is a large ecological zone characterised by its climate and its dominant plants and animals.
• The Sahel savanna in the far north has the least rainfall and sparse, drought-resistant vegetation.
• The tropical rainforest, with tall trees and high rainfall, occurs in the south.
• Savanna is grassland dotted with scattered trees and shrubs.
• Mangrove/swamp forest grows in the salty, muddy coastal and estuary areas of the south.
• The southern tropical rainforest receives the highest rainfall.
• Rainfall decreases from the wet south toward the dry north.
• The Sudan savanna lies south of the Sahel and has more vegetation than it.
• The Guinea savanna borders the rainforest and has the tallest grasses of the savanna zones.
• Montane forests grow on high mountains/plateaus where it is cooler.
• The savanna supports grazing animals such as antelopes and cattle.
• Climate — chiefly rainfall and temperature — is the main factor determining a biome.
• Rainforest trees grow tall to reach sunlight above the crowded canopy.
• Grassland/savanna, dominated by grasses, supports grazing herbivores.
• Mangroves have special roots to survive in salty, waterlogged coastal mud.
• Natural vegetation depends mainly on climate (rainfall, temperature) and soil.
• The tropical rainforest has the greatest biodiversity of Nigeria's biomes.
• The dry Sahel and northern savanna are most at risk of desertification.
• Savanna is a land (terrestrial) biome; the others are aquatic.
• Overgrazing and cutting trees expose soil, causing erosion and encouraging desertification.
• The rainforest has the highest rainfall and tallest trees.
• The dry Sahel has short grasses and scattered thorny trees.
• The Sudan savanna lies between the Guinea savanna and the Sahel.
• Vegetation thins from forest to savanna to near-desert going north.

Worked examples

Three Local (Nigerian) Biomes questions with the answer and a short explanation, so you can see how the topic is set before you practise the full set.

How Local (Nigerian) Biomes is tested in JAMB Biology

Our Local (Nigerian) Biomes bank holds 40 questions (2 easy, 23 medium, 15 hard). JAMB Biology typically returns to Local (Nigerian) Biomes year after year, so steady practice on this topic is high-value revision. Questions are multiple-choice with four options, and at UTME pace you get roughly 40 seconds each — which is why timed practice matters.

How to answer Local (Nigerian) Biomes questions

Work the stem first and predict the answer before you look at the options; then eliminate the ones that contradict the key facts above. Watch for “which is not…”, “all of the above” and “except” style stems, which are where rushed candidates lose easy marks on Local (Nigerian) Biomes. If a calculation or a precise definition is involved, work it from first principles rather than guessing from a half-remembered rule. When two options look right, re-read the stem for the qualifier that separates them — JAMB rarely repeats an option by accident. If you are still unsure, eliminate the two weakest choices to lift your odds, flag the question, and move on; never burn a full minute on one Biology item when the exam gives you about forty seconds each. Then come back to flagged questions with whatever time remains. The single most reliable way to get faster at Local (Nigerian) Biomes is repeated timed practice, so use the button above until the recurring patterns feel automatic.

Common mistakes to avoid in Local (Nigerian) Biomes

The errors that cost marks on Local (Nigerian) Biomes are usually careless rather than conceptual: misreading a negative stem, confusing two similar terms, or rushing a definition you actually know. Candidates also over-rely on “expo” and last-minute cramming instead of understanding the topic — which fails the moment JAMB rephrases a familiar idea. Treat every option as a claim to be checked against the facts above, keep your working tidy for any calculation, and don’t change a considered answer on a hunch. Above all, revise Local (Nigerian) Biomes actively by answering questions, not just by re-reading notes — recall under time is what the exam rewards.

Frequently asked questions

Is Local (Nigerian) Biomes part of the JAMB Biology syllabus?

Yes. Local (Nigerian) Biomes is a recognised topic in the JAMB Biology syllabus, covering define a biome and identify the major Nigerian vegetation zones. You should be able to recall its key facts and apply them to multiple-choice questions.

How many Local (Nigerian) Biomes questions can I practise on Belmadeng?

There are 40 original, JAMB-standard Local (Nigerian) Biomes questions in our free bank, each with the correct answer and a worked explanation. You can practise them untimed or as a timed test.

What are the most important points to know about Local (Nigerian) Biomes?

A biome is a large ecological zone defined by its climate and characteristic plants and animals. In Nigeria, rainfall decreases from south to north, giving a sequence of biomes: mangrove/swamp forest (salty coastal mud) and tropical rainforest (tall trees, highest rainfall and biodiversity) in the s…

How do I answer Local (Nigerian) Biomes questions quickly in JAMB?

Read the stem carefully, eliminate clearly wrong options, and match the remaining choices to the key facts for Local (Nigerian) Biomes. Practising timed Local (Nigerian) Biomes questions builds the speed you need for UTME's pace of about 40 seconds per question.

Are these JAMB Biology Local (Nigerian) Biomes questions past questions or original?

They are original questions written to JAMB (UTME) standard and mapped to the official syllabus — not reproduced past papers. This keeps them legal to use freely while closely mirroring how the real exam tests the topic.

Where can I practise Local (Nigerian) Biomes questions free without signing up?

Right here — tap “Start Local (Nigerian) Biomes practice” on this page to begin instantly. Belmadeng's CBT practice is completely free and needs no sign-up, download or subscription.

About these questions: original, JAMB-standard items written from the official UTME Biology syllabus (last reviewed 2026-09-18). Belmadeng is an independent study platform and is not affiliated with JAMB. Spotted an error? Use the report link.