Biology 2015 JAMB Past Questions
Biology 2015 JAMB Past Questions
1. A tissue is composed of a group of
- A. similar cells
- B. tissues
- C. systems
- D. related organs
Correct Answer: Option A
2. The population of different organisms that exist together in a habitat is called
- A. biomes
- B. biosphere
- C. community
- D. ecology
Correct Answer: Option C
Explanation
Option A is wrong. This is because, a biome is a regional or global land area that is characterized by the plants, animals and climate in that areaOption B is wrong. This is because, biosphere is the part of the earth that supports life.
Option C is correct. This is because, community consists of different organisms living together in a habitat.
Option D is wrong. This is because ecology is the study of organisms and their environment.
3. Which of the following serves as the brain box in man
- A. skeleton
- B. skull
- C. head
- D. spinal column
Correct Answer: Option B
4. Which organ removes the largest amount of excess water from the body?
- A. Liver
- B. Lung
- C. Kidney
- D. skin
Correct Answer: Option C
Explanation
Lungs: Remove carbon dioxideSkin: Sweat glands remove water, salts, and other wastes
Large intestine: Removes solid waste and some water in the form of feces
Kidneys: Remove urea, salts, and excess water from the blood
5. The following parts are involved in breathing process, except
- A. mouth
- B. nostrils
- C. ribs
- D. diaphragm
Correct Answer: Option A
Explanation
The act of breathing has two stages – inhalation and exhalation- Inhalation – the intake of air into the lungs through expansion of chest volume.
- Exhalation – the expulsion of air from the lungs through contraction of chest volume.
Inhalation and exhalation involves muscles:
- Rib muscles = the muscles between the ribs in the chest.
- Diaphragm muscle
6. Which of these is not a sampling method for determining population size?
- A. capture and re-capture method
- B. complete census
- C. Transect method
- D. systematic sampling
Correct Answer: Option D
7. A group of organisms of the same kind inhabiting the same environment is called
- A. ecosystem
- B. habitat
- C. population
- D. species
Correct Answer: Option D
8. The light sensitive cells in the human eye is called the ................
- A. Choroid
- B. Sclerotic layer
- C. retina
- D. cones
Correct Answer: Option D
Explanation
Cone cells, or cones, are one of two types of photo-receptor cells in the retina of the eye. They are responsible for color vision and function best in relatively bright light, as opposed to rod cells, which work better in dim light. Cone cells are densely packed in the fovea centralis, a 0.3 mm diameter rod-free area with very thin, densely packed cones which quickly reduce in number towards the periphery of the retina. There are about six to seven million cones in a human eye and are most concentrated towards the macula
9. The earliest form of life in animal kingdom is the
- A. class
- B. amphibian
- C. aves pisces
- D. reptilia
Correct Answer: Option C
10. Which of the following disease is not sexually transmitted?
- A. Gonorrhea
- B. Herpes
- C. Influenza
- D. Syphilis
Correct Answer: Option C
11. Which of the following is not a monocotyledonous seed?
- A. cowpea
- B. maize
- C. millet
- D. what
Correct Answer: Option A
12. The lowest unit of classification is the
- A. class
- B. genus
- C. phylum
- D. species
Correct Answer: Option D
Explanation
Option D is correct. This is because, species is the lowest unit in the hierarchy of classifying living organisms.See the illustration below.From kingdom phylum → class → order → family → genus → species
13. One of the following diseases is caused by fungi
- A. cassava mosaic
- B. coffee leaf rust
- C. leaf blight of cassava rossette
- D. disease of groundnut
Correct Answer: Option B
14. The by-product of photosynthesis is
- A. CO2
- B. O2
- C. C6H12O6
- D. H2O
Correct Answer: Option B
15. Gaseous exchange in the lungs takes place in the
- A. alveoli
- B. bronchi
- C. bronchioles
- D. trachea
Correct Answer: Option A
16. In eukaryotic cells,cellular respiration takes place in the
- A. nucleus
- B. cytoplasm
- C. centrioles
- D. mitochondrion
Correct Answer: Option D
17. One of the following causes Ebola fever
- A. Bacteria
- B. Fungi
- C. Protozoa
- D. Viruses
Correct Answer: Option D
18. The theory of survival of the fittest was propounded by …..
- A. Darwin
- B. Hooke
- C. Lamarck
- D. Linnaeus
Correct Answer: Option A
19. The deficiency of vitamin D leads to
- A. beriberi
- B. pellagra
- C. ricket
- D. scurvy
Correct Answer: Option C
20.. One of these is used for excretion in earthworm
- A. Contractile vacuole
- B. Flame cell
- C. Malpighian tubule
- D. Nephridium
Correct Answer: Option D
21. The following group of plants is the most advanced except
- A. bryophyte
- B. pteridophyta
- C. spermatophyte
- D. thallophytic
Correct Answer: Option D
22. Which of the following hormonal glands is located on top of the kidney?
- A. Adrenal
- B. gonads
- C. pancreas
- D. thyroid
Correct Answer: Option A
23. One of these is present in both plant and animal cell?
- A. Cell membrane
- B. Cell wall
- C. Chloroplast
- D. Large cell vacuole
Correct Answer: Option A
24. When the solute concentration of the cell and its surrounding medium are the same, the solution is said to be
- A. hypertonic
- B. hypotonic
- C. isotonic
- D. acidic
Correct Answer: Option C
Explanation
Option C is correct. This is because, any time there is the same solute concentration of both cell and its surrounding medium, the solution is said to be isotonic. So, there will be no losing or gaining of water into the cell or the surrounding medium.
25. The primary consumer in the food chain below is ................
Green plants → Grasshopper → Lizard → Snake → Hawk
- A. Grass hopper
- B. green plants
- C. hawk
- D. lizard
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