2012 JAMB BIOLOGY PAST QUESTIONS AND ANSWERS Leave a Comment / Jamb Biology / By Jamb Tutor Report a question What’s wrong with this question? You cannot submit an empty report. Please add some details. 0% 0 votes, 0 avg Created by Jamb TutorJamb Biology 2012 JAMB BIOLOGY PAST QUESTIONS AND ANSWERS 1 / 50 Category: Jamb Biology 2012 1. Which Question Paper Type of Biology as indicated above is given to you? a) Type Green b) Type Purple c) Type Red d) Type Yellow This question asks you to identify the specific type of Biology paper assigned to you. 2 / 50 Category: Jamb Biology 2012 2. The organelle responsible for heredity is labelled a) l b) ll c) lll d) l The question refers to the labelled structure in a cell that contains genetic material for heredity. 3 / 50 Category: Jamb Biology 2012 3. The part labelled IV is the a) mitochondrion b) cell wall c) endoplasmic reticulum d) nucleus This question examines knowledge of cell structures and their functions. 4 / 50 Category: Jamb Biology 2012 4. Which of the following is most advanced in the evolutionary trend of animals? a) Liver fluke b) Earthworm c) Snail d) Cockroach This question assesses understanding of evolutionary development among different animals. 5 / 50 Category: Jamb Biology 2012 5. Which of the following is the lowest category of classification? a) Class b) Species c) Family d) – Classification in biology is hierarchical; this question requires identifying the most specific level. 6 / 50 Category: Jamb Biology 2012 6. Plants that show secondary growth are usually found among the a) thallophytes b) pteridophytes c) monocotyledons d) dicotyledons Secondary growth in plants is typical in certain groups and involves increase in girth. 7 / 50 Category: Jamb Biology 2012 7. The fungi are distinct group of eukaryotes mainly because they have a) spores b) no chlorophyll c) many fruiting bodies d) sexual and sexual reproduction This question examines unique characteristics of fungi compared to other eukaryotes. 8 / 50 Category: Jamb Biology 2012 8. An arthropod that is destructive at early stage of its life cycle is a) butterfly b) mosquito c) bee d) millipede Certain arthropods have stages in their life cycles where they cause significant damage. 9 / 50 Category: Jamb Biology 2012 9. An animal body that can be cut along its axis in any plane to give two identical parts is said to be a) radially symmetrical b) bilaterally symmetrical c) asymmetrical d) symmetrical This question explores animal symmetry types, focusing on radial symmetry. 10 / 50 Category: Jamb Biology 2012 10. Which of the following possesses mammary gland? a) Dogfish b) whale c) shark d) catfish Mammary glands are a characteristic feature of mammals; this question assesses knowledge of which animals possess them. 11 / 50 Category: Jamb Biology 2012 11. The feature that links birds to reptiles in evolution is the possession of a) feathers b) beak c) skeleton d) scales This question addresses shared physical traits between birds and reptiles, reflecting evolutionary links. 12 / 50 Category: Jamb Biology 2012 12. Countershading is an adaptive feature that enables animals to a) fight enemies b) remain undetected c) warn enemies d) attract mates This question examines the purpose of countershading as an adaptation for survival in animals. 13 / 50 Category: Jamb Biology 2012 13. Which of the following plant structures lacks a waterproof cuticle? a) leaf b) stem c) root d) shoot A waterproof cuticle is present in some plant parts for water retention; this question identifies which part lacks it. 14 / 50 Category: Jamb Biology 2012 14. In the mammalian male reproductive system, the part that serves as a passage for both urine and semen is the a) urethra b) ureter c) bladder d) seminal vesicle This question tests knowledge of anatomy, specifically the male reproductive and urinary systems. 15 / 50 Category: Jamb Biology 2012 15. In plants, which of the following is required in minute quantities for growth? a) Copper b) Potassium c) Phosphorus d) Sodium Certain nutrients are needed in small amounts for plant growth; this question identifies one of them. 16 / 50 Category: Jamb Biology 2012 16. Which of the following organisms is both parasitic and autotrophic? a) Sundew b) Loranthus c) Rhizopus d) Tapeworm Some organisms can both make their own food and rely on others; this question asks for such an example. 17 / 50 Category: Jamb Biology 2012 17. A function of the hydrochloric acid produced in the human stomach during digestion is to a) neutralize the effect of bile b) coagulate milk protein and emulsify fats c) stop the action of ptyalin d) break up food into smaller particles This question focuses on the role of hydrochloric acid in the digestive process. 18 / 50 Category: Jamb Biology 2012 18. Which of the following is a polysaccharide? a) Glucose b) Sucrose c) Maltose d) Cellulose Polysaccharides are complex carbohydrates; this question identifies one among the options. 19 / 50 Category: Jamb Biology 2012 19. Transportation in the xylem is represented by a) I b) II c) III d) IV Xylem is involved in the upward movement of water in plants; this question uses a diagram for reference. 20 / 50 Category: Jamb Biology 2012 20. The arrow labelled II represents the a) release of oxygen b) intake of carbon (IV) oxide c) movement of photosynthates d) movement of nutrients This question relates to plant physiology, asking about the function represented by a specific arrow. 21 / 50 Category: Jamb Biology 2012 21. In the kidney of mammals, the site of ultrafiltration is the a) uriniferous tubule b) Bowman's capsule c) loop of Henle d) renal tubule Ultrafiltration is an essential process in kidneys, and this question requires identification of its site. 22 / 50 Category: Jamb Biology 2012 22. Which of the following is involved in secondary thickening in plants? a) Collenchyma and xylem cells b) Vascular cambium c) Vascular cambium and cork cambium d) Cork cambium and sclerenchyma Secondary thickening involves certain tissues in plants; this question identifies the main structures involved. 23 / 50 Category: Jamb Biology 2012 23. An example of a fruit that develops from a single carpel is a) okro b) tomato c) bean d) orange Fruits can develop from single or multiple carpels; this question tests knowledge of single-carpel fruits. 24 / 50 Category: Jamb Biology 2012 24. The developing embryo is usually contained in the part labelled a) IV b) III c) II d) I This question refers to a diagram and asks for the location of the developing embryo in plants. 25 / 50 Category: Jamb Biology 2012 25. The function of the part labelled III is to a) produce egg cells b) protect sperms during fertilization c) secrete hormones during coitus d) protect the developing embryo The question explores the roles of plant reproductive parts, focusing on the function of a labelled part. 26 / 50 Category: Jamb Biology 2012 26. Plant growth can be artificially stimulated by the addition of a) gibberellin b) kinin c) abscisic acid d) ethylene Certain substances can promote plant growth; this question identifies one used for artificial stimulation. 27 / 50 Category: Jamb Biology 2012 27. The autonomic nervous system consists of neurons that control the a) voluntary muscles b) heartbeat c) tongue d) hands This question tests knowledge of the autonomic nervous system, focusing on the organs it controls. 28 / 50 Category: Jamb Biology 2012 28. Plants of temperate origin can be grown in tropical areas in the vegetation zones of the a) rain forest b) Guinea savanna c) Sudan savanna d) montane forest Some plants adapt to different climatic zones; this question identifies the suitable zone in tropical areas. 29 / 50 Category: Jamb Biology 2012 29. The water cycle is maintained mainly by a) evaporation of water in the environment b) evaporation and condensation of water in the environment c) condensation of water in the environment d) transpiration and respiration in plants The water cycle involves various processes; this question focuses on the main contributing factors. 30 / 50 Category: Jamb Biology 2012 30. Organisms living in an estuarine habitat are adapted to a) withstand wide fluctuations in temperature b) survive only in water with low salinity c) withstand wide fluctuations in salinity d) feed only on phytoplankton and dead organic matter Estuarine habitats have unique conditions, and this question tests understanding of adaptive traits. 31 / 50 Category: Jamb Biology 2012 31. The presence of stilt roots, pneumatophores, sunken stomata and salt glands are adaptive features of plants found in the a) tropical rainforest b) mangrove swamps c) grassland d) montane forest This question focuses on plant adaptations for specific habitats, asking where such traits are found. 32 / 50 Category: Jamb Biology 2012 32. Which of the following animals can exist solely on the water they get from food and metabolic reactions? a) forest arboreal dweller b) desert dwellers c) forest-ground dweller d) rainforest dwellers Some animals can meet their water needs through food alone; this question identifies such animals. 33 / 50 Category: Jamb Biology 2012 33. The most likely first colonizers of a bare rock are a) mosses b) ferns c) lichen d) fungi Pioneer species begin ecosystem development on bare rock; this question identifies the typical first colonizers. 34 / 50 Category: Jamb Biology 2012 34. The carrying capacity of a habitat is reached when the population growth begins to a) increase slowly b) increase exponentially c) slow down d) remain steady Population growth changes as resources become limited; this question focuses on that turning point. 35 / 50 Category: Jamb Biology 2012 35. The abiotic factors that control human population include a) disease and famine b) space and rainfall c) flooding and earthquake d) temperature and disease Abiotic factors affect population growth; this question asks for examples affecting human populations. 36 / 50 Category: Jamb Biology 2012 36. An indigenous method of renewing and maintaining soil fertility is by a) clearing farms by burning b) planting one crop type c) adding inorganic fertilizers yearly d) crop rotation and shifting cultivation Indigenous farming methods promote soil health; this question highlights traditional soil practices. 37 / 50 Category: Jamb Biology 2012 37. The diseases caused by water-borne pathogens include a) gonorrhoea and poliomyelitis b) typhoid and syphilis c) tuberculosis and cholera d) typhoid and cholera Water-borne diseases spread through contaminated water; this question asks for examples. 38 / 50 Category: Jamb Biology 2012 38. The graph illustrates a) the highest frequency for height of 2 meters b) a discontinuously varying character c) a continuously varying character d) total yield in a cassava farm The graph is used to explain a concept in variation, requiring interpretation of the data presented. 39 / 50 Category: Jamb Biology 2012 39. The largest number of cassava plants has an approximate height of a) 1.4m b) 1.6m c) 1.8m d) 2.0m This question involves reading the graph to identify the most common height of cassava plants. 40 / 50 Category: Jamb Biology 2012 40. Which of the following is true in blood transfusion? a) person of blood group AB can donate blood only to another person of blood group AB b) persons of blood groups A and B can donate or receive blood from each other c) A person of blood group AB can receive blood only from persons of blood group A or B d) A person of blood group O can donate only to a person of blood group O Blood transfusion compatibility is essential; this question focuses on donor-recipient compatibility. 41 / 50 Category: Jamb Biology 2012 41. A yellow maize is planted and all the fruits obtained are of yellow seeds. When they are cross-bred, yellow seeds and white seeds are obtained in a ratio 3:1. The yellow seed is said to be a) non-heritable b) sex-linked c) a recessive trait d) a dominant trait This question tests understanding of genetics, focusing on dominant and recessive traits. 42 / 50 Category: Jamb Biology 2012 42. When a color-blind man marries a carrier woman, what is the probability of their offspring being color blind? a) 25% b) 50% c) 75% d) 100% This question involves applying probability to genetic inheritance for color blindness. 43 / 50 Category: Jamb Biology 2012 43. The correct base pairing for DNA is a) adenine → thymine and guanine → cytosine b) adenine → guanine and thymine → cytosine c) adenine → cytosine and guanine → thymine d) adenine → adenine and cytosine → cytosine DNA bases pair in specific ways, which is key to understanding DNA structure and replication. 44 / 50 Category: Jamb Biology 2012 44. The type of interaction shown is referred to as a) interspecific competition b) intraspecific competition c) mutualism d) cooperation This question describes biological interactions between organisms, asking for the specific type. 45 / 50 Category: Jamb Biology 2012 45. Which of the following statement is true of the interaction? a) P aurelia is better adapted for obtaining food than P caudatum b) P caudatum is better adapted for obtaining food than P aurelia c) both organisms cannot coexist d) both organisms cannot reproduce This question examines characteristics of the interaction in the diagram, focusing on competition. 46 / 50 Category: Jamb Biology 2012 46. The short thick beak in birds is an adaptation for a) crushing seeds b) sucking nectar c) tearing flesh d) straining mud Bird beak shapes relate to their diet and feeding habits; this question asks about adaptations. 47 / 50 Category: Jamb Biology 2012 47. The basking of Agama lizards in the sun is to a) change the color of their body b) raise their body temperature to become active c) fight to defend their territories d) attract the female for courtship Basking behavior in lizards is common; this question explores its purpose for Agama lizards. 48 / 50 Category: Jamb Biology 2012 48. The significance of a very large number of termites involved in nuptial swarming is to a) search for a favorable place to breed b) ensure that every individual gets a mate c) provide birds with plenty of food d) ensure their perpetuation despite predatory pressure Swarming in termites has ecological significance; this question explains one of its benefits. 49 / 50 Category: Jamb Biology 2012 49. The use and disuse of body parts and the inheritance of acquired traits were used to explain a) Darwin's theory b) Lamarck's theory c) genetic drift d) gene flow This question highlights an evolutionary theory focused on acquired traits, asking for the theorist. 50 / 50 Category: Jamb Biology 2012 50. From his study of Galapagos finches, Darwin derived his theory of evolution from a) comparative anatomy b) comparative physiology c) fossil remains d) comparative embryology Darwin’s observations of finches contributed to his evolutionary theory; this question identifies the basis of his study. 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