JAMB

JAMB past question, Biology, 1994, part 2

Biola Emmanuel - Fri, 31st May, 2019 @ 08:39: AM

JAMB past question, Biology, 1994:

To read questions 1 - 25, please click here

26. The fleshy base of a flower to which the different floral parts are attached is known as

  • A. calyx
  • B. sepals
  • C. thalamus
  • D. hypothalamus

 

27. When a short-sighted person views a distant object without spectacles, the image is formed

  • A. on the retina
  • B. in front of the retina
  • C. behind the retina
  • D. on the blind spot

 

28.

The graph shows the relationship between the body and atmospheric temperatures for dog and lizard.

What is the most appropriate deduction that could be made from the graph?

  • A. Lizards are more likely to survive hazards than dogs
  • B. Both animals maintain a constant body temperature
  • C. The dog’s body temperature is independent of the external temperature
  • D. The lizard’s body temperature varies with that of the dog

 

29. The part of the brain that controls heart beat and breathing is the

  • A. olfactory lobe
  • B. cerebellum
  • C. cerebral hemisphere
  • D. medulla oblongata

 

Use the list of ecological constituents below to answer questions 30 and 31.

  1. Mango
  2. Speargrass
  3. Goat
  4. Sheep
  5. Temperature
  6. Beans
  7. Rock
  8. Water

30. Items 1-4 can be regarded as

  • A. a population
  • B. a community
  • C. an ecosystem
  • D. a niche

 

31. The physical factors are represented by

  • A.1,5,6
  • B. 4,5,7
  • C. 5,7,8
  • D. 6,7,8

 

32. Which of the following sets is made up of decomposers?

  • A. Rhizopus, earthworm and protozoa
  • B. Mushroom, rhizopus and bacteria
  • C. Bacteria, earthworm and nematodes
  • D. Earthworm, sedges and platyhelminthes

 

33. The correct order in a food chain involving the organisms below is:

(1) Grasses (2) Hawks (3) Snakes (4) Grasshopper (5) Lizards

  • A. 1 2 3 4 5
  • B. 5 4 3 2 1
  • C. 1 4 5 3 2
  • D. 3 2 4 5 1

 

34. The organisms with the least number of individuals in a pyramid of numbers are the

  • A. secondary consumers
  • B. tertiary consumers
  • C. primary producers
  • D. primary consumers

 

Use the list of blomes below to answer questions 35 and 36.

  1. Desert
  2. Rain forest
  3. Southern Guinea
  4. savannah (Northern Guinea savannah)

35. A biome with a low annual rainfall, few scattered trees within dense layer of grasses and found in Kano and Katsina States is

  • A. 1
  • B. 2
  • C. 3.
  • D. 4

 

36. A biome where small mammals undergo aestivation for long periods is

  • A. 1
  • B. 2
  • C. 3.
  • D. 4

 

37. Ecological sucession ends with the formation of a stable

  • A. niche 
  • B. population
  • C. pioneer community
  • D. climax community


38. In a drought situation, plants suffer from water stress which could result in

  • A. reduced biochemical activities
  • B. enhanced chemical activities
  • C. enhanced microbial activities
  • D. reduced phototropic activities

 

39. The water-retention capacity of a soil indicates its

  • A. fertility
  • B. capillarity
  • C. aeration level
  • D. pH level

 

40. People who suck petrol with their mouths run the risk of increasing in their blood the concentration of

  • A. iron
  • B. lead
  • C. calcium
  • D. magnesium

 

41. The differences and similarities among living things account for

  • A. diversity
  • B. stability
  • C. competition
  • D. evolution

 

42. People with sickle-cell anaemia have haemoglobin

  • A. S and are homozygous recessive
  • B. A and are heterozygous recessive
  • C. S and are heterozygous recessive
  • D. A and are homozygous recessive

 

43. In the gene locus for eye colour in humans, the allele for brown eyes is dominant over the allele for blue eyes. If a homozygous brown-eyed girl has a brother with blue eyes, what are the likely phenotypes of their parents’ eye colour? (Eye colour is a sex-linked trait).

  • A. Both parents have blue eyes
  • B. Their father has blue eyes and their mother has brown eyes
  • C. Both parents have brown eyes
  • D. Their mother has blue eyes and their father has brown eyes

 

44. If a woman’s genotype is Tt Qq Rr, what would be the gene content of her eggs?

  • A. TQr, tqr
  • B. TQR, tqr
  • C. TqR, tQr
  • D. tQr, TQR

 

45. The sex-linked defect in which very slight cut produces severe bleeding is known as

  • A. anaemia
  • B. anorexia
  • C. haemophilia
  • D. haemolysis

.

46. A man who has the trait for colour blindness marries a normal woman. What percentage of their children would be sufferers, carriers and normal respectively?

  • A. 25%, 25% and 50%
  • B. 25%, 50% and 25%
  • C. 50%, 25% and 25%
  • D. 25%, 37.5% and 37.5%

 

47. Breathing root is an adaptation for survival in the

  • A.mangrove swamp
  • B. desert
  • C. arboreal habitat
  • D.savanna

 

48. Red coloration on the head of a male lizard helps it to

  • A. mark its territory
  • B. camouflage in the environment
  • C. secure its mate
  • D. defend itself

 

49. A phenomenon by which an animal goes into a state of dormancy during the dry season is called

  • A. hibernation
  • B. aestivation
  • C. incubation
  • D. deactivation

 

50. The anatomical evidence usually used in support of all evolutionary relationship among whales, humans, birds and dogs is the possession of

  • A. thick skin
  • B. pentadactyl limb
  • C. tail
  • D. epidermalstructures

 

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