Also read: Jamb past question | Chemistry 1983 JAMB Questions

1. What do bacteria in root nodules derive from the host plant?

A Protection and minerals

B Water and minerals

C Carbonhydrates and water

D Protection and carbohydrates

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2. Free nitrogen is released to the atmosphere by

A Nitrogen-fixing bacteria

B nitrifying bacteria

C denitrifying bacteria

D saprophytic bacteria

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3. Excretory products responsible for the red, purple and blue colours of flowers are called

A alkaloid

B tannins

C anthocyanins

D resins

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4. Transpiration can be measured with a

A photometer

B hygrometer

C potometer

D barometer

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5.If a ring of bark and phloem is removed from a stem, the

A plant dies immediately

B plant dies after two days

C movement of food is not affected

D movement of minerals is hardly affected

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6. The vilius in the small intestine is significant because it

A increase the surface area for absorption

B increase the surface area for digestion

C assists in mixing digested food

D assists in filtering undigested food

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7. The organ which secretes digestive enzymes as well as hormones is the

A liver

B salivary gland

C pancreas

D spleen

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8. Haemophilia results from the mutation of the genes

A in the sex chromosome

B which control skin colour

C which control the mechanism for blood-clotting

D which control the formation of haemoglobin

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9. Which of the following is an omnivore?

A Praying mantis

B Hawk

C Mouse

D Grasshopper

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10. which of the organisms will have the lowest population in an ecosystem?

A Hawk

B Cowpea

C Praying mantis

D Mouse

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11. In a savanna ecosystem the abiotic factors include

A legumes, temperature and sandy soil

B water, temperature and soil

C minerals, oxygen and reptiles

D water, soil and grasses

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12. An individual in the AB blood group is a universal recipient for blood donation because

A all the red blood cells do not carry antigen

B all the red blood cells carry antigen

C all the red blood cells carry antigen

D there are no anti-A and anti-B antibodies in the serum

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13. What stage during cell division is represented in the figure above?

A Prophase

B Metaphase

C Anaphase

D Telophase

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14. What will be the result of the first filial generation (F1) and the second filial generation (F2) of a mono-hybrid cross between pure line normal-winged Drosophilia flies and pure line short-winged flies, if the gene for the normal wing is dominant?

A F1 flies all short-winged and F2 flies all normal-winged

B F1 flies all normal and F2 flies all short-winged

C F1 flies all short-winged and three-quarters of F2 flies are short-winged

D F1 flies all normal-winged and three-quarters of F2 flies are normal-winged

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15. The part of the ear that is concerned with balance is the

A semi-circular canals

B incus

C malleus

D Eustachian tube

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16. In organism where the 2nd number of chromosomes is 16, the number of chromosomes in each gamete will be

A 32

B 16

C 8

D 4

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17. The elephant grass is propagated vegetatively by means of

A corms

B bubils

C suckers

D stolons

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18. The spores of ferns are dispersed by

A wind

B water

C insects

D explosive mechanism

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19. Hydra removes undigested food by

A passing it through the anus

B passing it through the mouth

C means of a contractile vacuole

D egesting it through the body surface

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20. The algae, bryophytes and pteridophytes are similar in that they

A are sea weeds

B have no vascular tissue

C require moisture for fertilization

D are microscopic plants

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21. Which of the following groups of invertebrates reproduces by budding?

A Arthropoda

B Annelides

C Mollusces

D Coelenterata

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22. The part labelled 3 is the

A leaf scar

B lenticle

C auxillary bud

D girdle scar

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23. Which of the following characteristics is common to Amoeba and Paramecium?

A Oral groove

B Trichocyst

C Contractile vacuole

D Cilia

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24. Viruses are considered to be living organisms because they

A possess transmittable characters

B move from one place to anothe

C respond to stimulatio

D ingest food materialsnr

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25. In a reflex action, impulse flows from

A 1 to 2

B 2 to 1

C 4 to 1

D 4 to 2

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26. In a saprophyte, sex organs are produced in the

A Gamotrophyte

B Rhizoid

C Protonema

D Sporopyte

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27. All the cell bodies in the spinal cord are found in

A 1

B 2

C 3

D 4

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28.If the blood is too concentrated, more water is absorbed from

A 5

B 4

C 3

D 1

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29. Which structure is the glomerulus?

A 5

B 3

C 2

D 1

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30. An acidic soil can be improved upon by

A sedimentation

B leaching

C flocculation

D watering

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31. Which of the following constitute pollution?

A Droppings from birds

B loud disco sound

C A pack of cigarettes

D Refuse in an incinerator

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32. Physiological adaptation to very dry condition in animals is called

A hibernation

B aestivation

C rejuvenation

D xeromorphism

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33. The salinity of a brackish enviroment

A increases immediately after rain

B increase at the end of rainy season

C Decrease with increase in micro-organisms

D increase during dry season

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34. Which set of disease is spread mainly by insect vectors?

A Cholera, tenia and gonorrhoea

B Poliomyelitis, tuberculosis and syphilis

C Cholera, malaria and tuberculosis

D Malaria, cholera and river blindness

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35. Which of the following food substance will produce a brick-red colour when warmed with Benedict's solution?

A Glucose

B Starch

C Egg white

D Maltose

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36. The first step in the process of photosynthesis is the

A activation of the chlorophyll

B photolysis of water

C reduction of carbondioxide

D formation of sugar

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37. Which type of the following cells is thin-walled and living at maturity?

A Collenchyma

B Sieve tube

C xylem vessel

D sclerenchyma

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38. The mode of nutrition in which digestion is extracellular is

A holophytic

B parasitic

C holozoic

D saprophytic

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39. which of the following disease is rarely spread by a housefly?

A Yellow fever

B Dysentry

C Typhoid fever

D Poliomyelitis

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40. A feature which adapts birds to flight is the possession of

A scaly legs

B light bones

C two walking legs

D a pointed beak

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41. The nephridia in the earthworm form part of the

A reproductive system

B respiratory system

C circulatory system

D excretory system

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42. In the tapeworm the suckers on the scolex are used for

A sucking the blood of the host

B holding fast to the host

C reproduction

D locomotion

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43. Which of the following does external fertilization takes place?

A Toad

B Lizard

C Bird

D Cockcroach

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44. Which of the following animals has homodont dentition?

A Rat

B Man

C Lizard

D Pigeon

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45. The type of placentation shown in the figure above is a

A parietal

B marginal

C axile

D free-central

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46. During mammalian embryo development, large amounts of oestrogen and progesterone are produced in the

A umbilical cord

B amnion

C placenta

D amniotic fluid

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47. Etiolation is caused by the influence of

A minerals salt

B water

C carbondioxide

D light

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48. Muscles are indirectly attached to bones by means of

A ligaments

B membranes

C tendons

D sutures

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49.Fruits which develop without fertilization are described as

A simple

B pathencorpic

C aggregate

D compound

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50. What do bacteria in root nodules derive from the host plant?

A Gamotrophyte

B Rhizoid

C Protonema

D Sporopyte

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