JAMB BIOLOGY LIKELY QUESTIONS 2020
1. The function of endoplasmic reticulum is A. protein synthesis B. intracellular transport of materials C. digestion and destruction of foreign bodies D. production of energy from glucose.
2. Which of the following features of Euglena is found only in animals? A. Paramylum granules. B. Flagellum C. Pellicle D. Pyrenoid.
3. An organism found on a bare rock surface has features of algae and fungi. The organism is A. an epiphyte B. a lichen C. a bryophyte D. a fern.
JAMB BIOLOGY LIKELY QUESTIONS 2020
4. In a plant exhibiting alternation of generations, the diploid multicelluLar stage is known as A. gametophyte B. spermatophyte C. holophyte D. sporophyte.
5. A characteristic that distinguishes bryophytes from flowering plants is the A. possession of true stems and leaves B. ability to reproduce asexually C. absence of vascular tissues D. ability to grow in moist habitats.
6. A good example of a diploblastic organism is A. Amoeba B. Hydra C. Earthworm D. Roundworm.
7. The function of the clitellum in the earthworm is to A. aid digestion B. prevent desiccation C. assist locomotion D. secrete cocoon.
8. The crayfish is an arthropod because A. its body consists of a cephalothorax and an abdomen B. it has a pair each of antennae and antennules C. every segment of its body carries a pair of appendages D. its body is covered with an exoskeleton made of chitin.
9. The hypha of Rhizopus is said to be coenocytic because it A does not contain chlorophyll B. has no cross walls C. is vacuolated D. stores oil globules.
10. In the reproduction of mosses, water is essential because A. they live in moist habitats B. they cannot reproduce without water C. the male gametes must swim to fertilize the ovum D. they produce spores.
11. In tapeworm, the two structures that run through the length of the body are the A. nerve cord and the excretory duct B. sperm duct and the nerve cord C. genital pore and the excretory duct D. sperm duct and the genital pore.
12. Which of the following is NOT a characteristic of snails? A. Bilateral symmetry B. Chitinous exoskeleton C. Muscular foot D. Soft unsegmented body in a mantle.
13. In the life history of a butterfly, destruction of crops is caused by the A. maggot B. nymph C. caterpillar D. pupa.
14. Secondary thickening is initiated in a dicotyledonous stem by the A. xylem parenchyma B. secondary phloem C. endodermis D. cambium.
15. In demonstrating the importance of mineral elements in the plants, the culture bottle must be darkened to A. prevent algal growth in culture solution B. allow root growth C. prevent breakdown of mineral elements D. prevent photosynthesis in the root.
16. The vitamin which is important in the formation of the retina pigments is A. vitamin A B. vitamin B C. vitamin C D. vitamin D.
17. The function of the loop of Henle is to A. increase the flow of urine B. concentrate amino acids in the kidney tissue C. concentrates sodium chloride in the medulla of the kidney D. increase the volume of urine.
18. The oxidative part of the respiration process takes place in the A. mitochondria B. ribosomes C. endoplasmic reticulum D. golgilbodies.
19. Sclerenchyma cells are lignified to A. strengthen and support the plant B. transport synthesized food C. conduct water and salt D. protect the plant from injury.
20. A flower showing radial symmetry is said to be A. pentamerous B. protandrous C. protogynous D. actinomorphic.
21. The ratio of carriers to sicklers in the F1 generation derived from a parental cross of two carriers of haemoglobin S gene is A.3:1 B. 1:3 C. 2:1 D. 1:2
22. The plantain reproduces asexually by A. suckers B. buds C. fragments D. spores.
23. Parenchyma cells serve as supporting tissue when they A. contain chloroplasts B. have crystals C. become flaccid D. become turgid.
24. In vegetative propagation, which of the following requires part of another plant to develop? A. Scion B. Bulb C. Rhizome D. Sucker
25. Which of the following has the greatest influence on the distribution of animals in marine and fresh water habitats? A. pH. B. Salinity C. Water current D. Turbidity
26. One of the characteristics of plant in the savanna is the A. possession of thin, smooth barks B. possession of large tap roots C. production of seedlings on mother plant D. possession of thick, flaky barks.
27. Which of the following disease can be contracted areas with fast flowing rivers? A. Schistosomiasis B. Elephantiasis C. Syphilis D. Onchocerciasis.
28. The main function of the choroid is A. protection of the eye ball B. transmission of light C. supply of nutrients to tissues of the eye D. converging light.
29. During cell division, the two strands of chromosomes are joined at a point called A. spindle B. chromatid C. centromere D. aster
30. The lumbar vertebra when compared with a thoracic vertebra has a A. longer neural spine B. wider neural canal C. thicker centrum D. shorter transverse process.
31. Which of the following is a sex-linked character? A. Sickle-cell anaemia B. Tongue rolling C. Skin colour D. Colour blindness.
32. Wind-pollinated flowers usually have A. rough pollen grains B. sticky stigmas C. small and short stigmas D. long styles.
33. Lichen is an example of A. a saprophytic organism B. a symbiotic association C. an epiphytic plant D. a carnivorous plants .
34. Which of the ways of controlling bilharzia can result in pollution? A Clearing water weeds on which the snails feed. B. Treating infected people with drugs C. Preventing contamination of water by infected urine and faeces D. Applying chemical to kill the snails.
35. Which ecological factor exerts the greatest influence on the structure of the profiles? A. topographic B. edaphic C. biotic D. climatic
36. 5g of oven dried soil was heated in a furnace for 24hours, after cooling, it weighed 4.8g what is the amount of humus in the soil? A. 40.0g per 100g dry soil B.4.4g per 100g dry soil C. 4.0g per 100g dry soil D. 0.4g per 100g dry soil.
37. In a water culture experiment, a plant showed poor growth and yellowing of the leaves. These may be due to deficiency of A. copper B. iron C. magnesium D. calcium.
38. The manufacture of carbohydrates by plants takes place only in A. the leaves B. the green stemsC. chlorophylous parts D. flowering plants.
39. The structures that prevent food particles from escaping through the fish gills are called gill A. arches B. filaments C. rakers D. lamellae.
40. The natural tendency of organism as they evolve is to A. decrease in size B. increase in number C. develop specialized structures D. feed indiscriminately.
41. The condition that encourages denitrification is A. low soil oxygen B. high soil nitrogen C. absence of soil bacteria D. lightning and thunderstorm.
42. In which of the following groups of animals is the Malpighian tubule found? A. Lizards, snakes and frogs B. Crickets, houseflies and grasshoppers C. Millipedes, centipedes and scorpions D. Earthworms, roundworms and flatworms.
43. A freshwater plant such as water lily can solve the problem of buoyancy by the possession of A. aerenchymarous tissues B. dissected leaves C.. thin cell walls of the epidermis D. water-repelling epidermis.