2018 JAMB Biology Past Questions & Answers

Question 1

Which of the following structures is not a skeletal material?

Accepted Answer

D. Muscle

Answer

A. Chitin

Answer

B. Cartilage

Answer

C. Bone

Question 2

The flippers of a whale and the fins of a fish are examples of

Accepted Answer

D. convergent evolution

Answer

A. divergent evolution

Answer

B. co-evolution

Answer

C. continuous variation

Question 3

Spectacles with convex lenses correct long-sightedness by

Accepted Answer

A. converging the light rays before they enter the eye

Answer

B. diverging the light rays before they enter the eye

Answer

C. reducing the light intensity before it enters the eye

Answer

D. increasing the light intensity before it enters the eye

Question 4

The yellowish colored liquid component of blood that normally holds the blood cells in suspension is

Accepted Answer

B. plasma

Answer

A. serum

Answer

C. water

Answer

D. thrombocyte

Question 5

The function of pith in plant is

Accepted Answer

B. Pith, or medulla, is a tissue in the stems of vascular plants. Pith is composed of soft, spongy parenchyma cells, which store and transport nutrients throughout the plant.

Answer

A. Absorb mineral salt and nutrient from the soil

Answer

C. trap chlorophyll from the sunlight

Answer

D. Removal of waste product from the plant

Question 6

Which of the following cycles involves the process of precipitation and transpiration?

Accepted Answer

A. water cycles

Answer

B. carbon cycle

Answer

C. nitrogen cycle

Answer

D. oxygen cycle

Question 7

The overall reaction in glycolysis can be summarised as

Accepted Answer

B. C$_{6}$H$_{12}$O$_{6}$ -----> 2C$_{3}$H$_{4}$O$_{3}$ + 4H + 2ATP

Answer

A. C$_{6}$H$_{12}$O$_{6}$ -----> C$_{3}$H$_{4}$O$_{3}$ + 4H + ATP

Answer

C. C$_{6}$H$_{12}$O$_{6}$ -----> 2C$_{3}$H$_{4}$O$_{3}$ + 4H + ADP

Answer

D. C$_{6}$H$_{12}$O$_{6}$ -----> 2C$_{3}$H$_{4}$O$_{3}$ + 4H + 2ADP

Question 8

Name the blood cells in which nucleus is absent

Accepted Answer

B. Blood Platelets

Answer

A. Lymphocytes

Answer

C. Monocytes

Answer

D. Eosinophil

Question 9

Physiological adaptation to very dry conditions in animal demonstrates

Accepted Answer

C. Aestivation

Answer

A. Xeromorphism

Answer

B. Hibernation

Answer

D. Rejuvenation

Question 10

Long neck in giraffe is used to illustrate the theory of

Accepted Answer

A. Use and Disuse

Answer

B. Origin of species

Answer

C. Origin of life

Answer

D. Natural selection

Question 11

The immediate product of meiosis in flowering plants is the

Accepted Answer

B. gametophyte

Answer

A. sporophyte

Answer

C. zygote

Answer

D. endosperm

Question 12

The temporary union of two organisms and the exchange of micronuclear elements is called

Accepted Answer

A. Conjugation

Answer

B. Binary fusion

Answer

C. Extrapolation

Answer

D. Interexchange

Question 13

Which of the following instruments is used to estimate the number of plants in a habitat?

Accepted Answer

C. quadrant

Answer

A. pooter

Answer

B. pitfall trap

Answer

D. sweep net

Question 14

Mineral salts can be absorbed into roots by

Accepted Answer

C. Diffusion and active transport

Answer

A. Osmosis only

Answer

B. Osmosis and diffusion

Answer

D. Imbition only

Question 15

A pollutant that is mostly associated with acid rain is

Accepted Answer

A. Nitrogen oxides

Answer

B. Ozone

Answer

C. Flourine

Answer

D. Carbony (IV) oxide

Question 16

An animal which is active during the day is known as a

Accepted Answer

B. diurnal animal

Answer

A. nocturnal animal

Answer

C. terrestrial animal

Answer

D. homortacmic animal

Question 17

Cold blooded animals are referred to as

Accepted Answer

A. Poikilothermic

Answer

B. Homothermic

Answer

C. Polythermic

Answer

D. Homeostatic

Question 18

Which of the following organisms is a primary consumer?

Accepted Answer

B. sheep

Answer

A. dog

Answer

C. grass

Answer

D. fungus

Question 19

What is the critical limiting factor for plants below the photic zone in an aquatic ecosystem?

Accepted Answer

C. intensity of light

Answer

A. availability of nutrients

Answer

B. availability of water

Answer

D. carbon dioxide concentration

Question 20

The hormones secreted by pancreas serves to

Accepted Answer

C. Lower blood glucose level

Answer

A. Facilitate the development of facial hairs

Answer

B. Raise the level of calcium in the blood

Answer

D. Make the body react to emergencies

Question 21

Ozone hole refers to

Accepted Answer

C. decrease in thickness of ozone layer in stratosphere

Answer

A. hole in ozone layer

Answer

B. decrease in the ozone layer in troposphere

Answer

D. increase in the thickness of ozone layer in troposphere

Question 22

What is the function of contractile vacuole in paramecium?

Accepted Answer

D. Gets rid of excess water

Answer

A. Produces Enzymes

Answer

B. Gets rid of excreta

Answer

C. Stores and digest food

Question 23

Red blood cells were found to have burst open after being placed in distill for an hour. This phenomenon is known as

Accepted Answer

C. haemolysis

Answer

A. plasmolysis

Answer

B. diffusion

Answer

D. wilting

Question 24

Total salt content in blood is about

Accepted Answer

D. 0.85 to 0.9%

Answer

A. 1.85 to 1.9%

Answer

B. 11.85 to 11.9%

Answer

C. 2.85 to 2.9%

Question 25

Examples of micronutrients include the following except

Accepted Answer

D. carbon

Answer

A. vitamins A

Answer

B. Vitamin B6

Answer

C. Biotin

Question 26

The vitamin which is important in the formation of the retina pigment is

Accepted Answer

A. Vitamin A

Answer

B. Vitamin B

Answer

C. Vitamin C

Answer

D. Vitamin D

Question 27

What would happen if solution Y is more concentrated than solution X in fig 2

Accepted Answer

D. The level of Y would rise, X would fall.

Answer

A. The level of X would rise, Y would falls

Answer

B. The level of X would rise, Y would rise

Answer

C. The level of X and Y stands the same

Question 28

the vessel carrying oxygenated blood to the tissues is

Accepted Answer

C. Aorta

Answer

A. Arteries

Answer

B. Ventricles

Answer

D. Lung

Question 29

Which of the following relationship involves only one organism

Accepted Answer

A. Saprophytism

Answer

B. Commensalism

Answer

C. Parasitism

Answer

D. Symbiosis

Question 30

Maltose is combination of glucose and

Accepted Answer

A. glucose

Answer

B. sucrose

Answer

C. Galactose

Answer

D. fructose

Question 31

The reason why the flow of blood through the capillaries is very slow is

Accepted Answer

D. Their large numbers and one cell-thick walls enables them to provide a large surface area through which materials can be exchanged between the blood and the body cells.

Answer

A. because the walls of Capillaries are very thick

Answer

B. to avoid high blood pressure

Answer

C. to ensure that the individual does not get dizzy

Question 32

Double fertilisation is a unique features of

Accepted Answer

A. Angiosperms

Answer

B. Bryophytes

Answer

C. Pteridophytes

Answer

D. Algae

Question 33

The energy released by 1 gram of glucose is

Accepted Answer

B. 4 kcal

Answer

A. 6 kcal

Answer

C. 5 kcal

Answer

D. 3 kcal

Question 34

How many days is used for incubation of an egg to release chick

Accepted Answer

A. 21

Answer

B. 22

Answer

C. 20

Answer

D. 23

Question 35

A group of organism of the same species living together in a particular area is described as

Accepted Answer

C. Population

Answer

A. Colony

Answer

B. Community

Answer

D. Niche

Question 36

Which of the following diseases is not hereditary?

Accepted Answer

B. Scabies

Answer

A. Albinism

Answer

C. Haemophilla

Answer

D. Colour blindness

Question 37

Swollen, bleeding gums are another common sign of which vitamin

Accepted Answer

C. Vitamin C

Answer

A. Vitamin K

Answer

B. Vitamin B

Answer

D. Vitamin D

Question 38

The cytoplasm of a cell is considered a very important component because it

Accepted Answer

B. suspends all cell organelles

Answer

A. regulates the amount of energy in the cell

Answer

C. is the outermost part of the cell

Answer

D. is solely responsible for cell division

Question 39

The damage to ozone layer is caused by

Accepted Answer

C. Chlorofluorocarbons

Answer

A. Oxygen

Answer

B. Nitrogen oxide

Answer

D. sulphur dioxide

Question 40

The four classes of cnidarian include the following except

Accepted Answer

A. Turbellaria

Answer

B. Anthozoa

Answer

C. Scyphozoa

Answer

D. cubozoa

Question 41

The longest bone in the body is the

Accepted Answer

B. femur

Answer

A. humerous

Answer

C. scapula

Answer

D. tibia

2018 JAMB Biology Past Questions

Questions 1–45

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2018 JAMB Biology Past Questions

Questions 1–45

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