2019 JAMB Biology Past Questions & Answers

Question 1

The specific portion of a habitat which is occupied by a particular species is referred to as

Accepted Answer

B. Ecological niche

Answer

A. Ecological population

Answer

C. Biotic community

Answer

D. Ecosystem

Question 2

Which of the following pairs of organisms are photosynthetic?

Accepted Answer

B. Euglena and chlamydomonas

Answer

A. Amoeba and paramecium

Answer

C. Volvox and Rhizopus

Answer

D. Nostoc and plasmodium

Question 3

Plants which can survive in extremely dry places are called

Accepted Answer

B. Xerophytes

Answer

A. Mesophytes

Answer

C. Hydrophytes

Answer

D. Angiosperms

Question 4

Which of the following statement describes an autonomic nervous system

Accepted Answer

D. It affects glands, cardia muscles and smooth muscles

Answer

A. It always stimulates effectors

Answer

B. Activities are voluntary

Answer

C. It dials with external stimuli and their responses

Question 5

Inheritable character/features possessed by an organism can be referred to as

Accepted Answer

C. Traits

Answer

A. Genes

Answer

B. Locus

Answer

D. Allelo morphs

Question 6

In the theory of use and disuse Lamarck proposed that evolution occurred because of the following except

Accepted Answer

A. There is natural selection of offspring

Answer

B. There is great changes in the environment

Answer

C. Organism develop specialised characters

Answer

D. The characters are inheritable

Question 7

The possession of chloroplast in Euglena virids enables it to

Accepted Answer

B. Carry out photosynthesis

Answer

A. Store starch

Answer

C. Reproduce

Answer

D. Respond to light

Question 8

Only specially adapted micro-organisms are found in

Accepted Answer

A. Salty water

Answer

B. Humid air

Answer

C. Moist soil

Answer

D. Mouth cavities

Question 9

Which of the following juices contains the enzyme ptyalin?

Accepted Answer

D. Saliva

Answer

A. Gastric juice

Answer

B. Succus

Answer

C. Pancreatic juice

Question 10

In plants, respiration occurs in

Accepted Answer

C. All living cells

Answer

A. The stomata and lenticel only

Answer

B. Mesophyll cells only

Answer

D. The root only

Question 11

The attachment of the embryo to the wall of the uterus is called

Accepted Answer

B. Implantation

Answer

A. Ovulation

Answer

C. Gametogenesis

Answer

D. Placentation

Question 12

The organic molecule(s) present in the nucleus is/are

Accepted Answer

A. DNA

Answer

B. DNA and ATP

Answer

C. ATP and RNA

Answer

D. RNA

Question 13

Which organ removes the largest quantity of water from the blood?

Accepted Answer

C. Kidney

Answer

A. Lung

Answer

B. Skin

Answer

D. Intestine

Question 14

Which of the blood corpusles are irregular and amoeloid in shape

Accepted Answer

A. Leucocytes

Answer

B. Erythrocytes

Answer

C. Thrombocytes

Answer

D. Plasma

Question 15

In an ecosystem, the organism which changes light energy into stored chemical energy is the

Accepted Answer

B. Producer

Answer

A. Consumer

Answer

C. Decomposer

Answer

D. Carnivore

Question 16

Which of the following essential substance is contained in vegetable?

Accepted Answer

C. Mineral Salts

Answer

A. Chlorophyll

Answer

B. Glucose

Answer

D. Carbon dioxide

Question 17

Competition among individuals of a population increases the

Accepted Answer

C. Survival of the fittest

Answer

A. Number of organisms

Answer

B. Availability of nutrient supplied

Answer

D. Enlargement of the territory

Question 18

Which of the following structures controls the activities of the living cell?

Accepted Answer

A. Nucleus

Answer

B. Centrosome

Answer

C. Mitochondrion

Answer

D. Golgi body

Question 19

Viruses are pathogens of the following diseases except

Accepted Answer

A. Tuberculosis

Answer

B. Measles

Answer

C. Small pox

Answer

D. Poliomyelitis

Question 20

One of the following is not the theory of natural selection stated by Charles Dawin

Accepted Answer

A. Characteristics acquired through use or disuse are transmitted offspring

Answer

B. Variations appear by themselves in a population

Answer

C. Heredity variations are transmitted to offspring

Answer

D. Species that are the fittest for the environment contribute more offsprings to the next needs of the generation

Question 21

Which of the following describes an example of fertilization in higher organisms

Accepted Answer

A. Fusion of sperm and egg nuclei

Answer

B. Pollen grain landing on a sticky stigma

Answer

C. Ejaculation of the egg and pollen grain

Answer

D. Ejaculation of sperm into the female body

Question 22

Which of the following is a nitrifying bacterium?

Accepted Answer

B. Nictrobacter

Answer

A. Rhizobium

Answer

C. Azotobacter

Answer

D. Pseudomonas

Question 23

The type of nutrition shown by spirogyra is

Accepted Answer

D. Holophytic

Answer

A. Symbiosis

Answer

B. Holozoic

Answer

C. Chemosynthetic

Question 24

A flowering plant having both the male and female flowers on the same plant is said to be

Accepted Answer

C. Monoecious

Answer

A. Regular

Answer

B. Irregular

Answer

D. Dioecious

Question 25

Which of the following pairs of scientists discovered the Rhesus factor in human blood?

Accepted Answer

C. Landsteiner and Lavine

Answer

A. Hooke and Lavine

Answer

B. Darwin and Landsteiner

Answer

D. Hooke and Darwin

Question 26

Raw materials required by green plants to manufacture their food are

Accepted Answer

B. inorganic substances

Answer

A. mainly fluids

Answer

C. living materials

Answer

D. mainly gases

Question 27

One of the following is a process of transmission of hereditary characteristics by chromosomes

Accepted Answer

B. Separation of homologous chromosomes into four daughter cells

Answer

A. Genes relating to the same character occupy identical locations on the chromosomes

Answer

C. Separation of gametes during fertilization

Answer

D. Dictating the formation of a protein by a gene in a chromosome

Question 28

One important characteristics of green plant is that they

Accepted Answer

C. Are autotropic

Answer

A. possess specialized sense organs

Answer

B. Are usually motile

Answer

D. Respond slowly to stimuli

Question 29

A virus can sometimes be regarded as a living organism because it

Accepted Answer

D. Reproduces in living cells

Answer

A. causes diseases in plants and animals

Answer

B. It exists in a variety of shapes

Answer

C. Is easily visible with the aid of an electron microscope

Question 30

One of the following is an effect of clay soil on vegetation

Accepted Answer

A. Supports luxuriant vegetation such as forest

Answer

B. Supports scanty vegetation

Answer

C. Does not support light vegetation

Answer

D. Support arid vegetation

Question 31

The presence of ______ for swimming in a tad-pole enables it to adapt in an aquatic habitat.

Accepted Answer

C. Tail

Answer

A. Gills

Answer

B. Swim bladder

Answer

D. Fins

Question 32

One of the major ways in which the blood is able to defend the body against disease causing organisms is

Accepted Answer

B. Clumping

Answer

A. Absorption of fatty acids and glycerol

Answer

C. Single circulation

Answer

D. Translocation

Question 33

The insect trapping movements of the leaves of the venus fly trap is a behavioural adaptation for

Accepted Answer

C. obtaining food

Answer

A. support

Answer

B. surviving adverse weather conditions

Answer

D. dormancy

Question 34

Good quality food will perform the following functions in human except

Accepted Answer

B. Providing resistance against malaria

Answer

A. Supplying energy

Answer

C. Maintaining health

Answer

D. Sustaining growth

Question 35

The study which involves the inter-relationship between groups of organisms or species of organisms living together in an area is

Accepted Answer

C. Synecology

Answer

A. Autecology

Answer

B. Ecological niche

Answer

D. Ecosphere

Question 36

Trees in Savanna habitats usually have thick bark which mainly.

Accepted Answer

D. Resist bush fires

Answer

A. Reduces the rate of transpiration

Answer

B. Protect them from scorching sun

Answer

C. Protect them from heavy winds

Question 37

Which of the following are components of glomerular filtrate?

Accepted Answer

C. All the components of blood except plasma protein and cells

Answer

A. All the components of blood except mineral salts

Answer

B. Water and salt only

Answer

D. Blood cells, amino acid, salts and nitrogenous wastes

Question 38

The change in the genetic make up of an organism resulting in an inheritable characteristics which is new is

Accepted Answer

A. Mutation

Answer

B. Locus

Answer

C. Hybrid

Answer

D. Diploid

Question 39

Albinism is an expression of trait controlled by

Accepted Answer

B. Recessive genes

Answer

A. Chromosomes

Answer

C. Dominant genes

Answer

D. Mutation

Question 40

Possession of thin membrane enables a tapeworm to

Accepted Answer

C. Absorb digested food from the host's intestine to their system

Answer

A. Fasten themselves to the wall of the host's intestine

Answer

B. Lay numerous eggs

Answer

D. Shield themselves inside the host's intestine with anti-enzymes in order to avoid being digested

Question 41

Which of the following is considered to be the first product of Photosynthesis?

Accepted Answer

B. Starch

Answer

A. Protein

Answer

C. Energised Chlorophyll

Answer

D. Hydroxyl ions

Question 42

The period of inactivity seen in some animals during long period of heat or drought is

Accepted Answer

B. Aestivation

Answer

A. Migration

Answer

C. Hibernation

Answer

D. Adaptation

Question 43

Which of the following controls all voluntary actions

Accepted Answer

B. Cerebrum

Answer

A. Olfactory lobes

Answer

C. Hypothalamus

Answer

D. Pons varolii

Question 44

The organism above can be found in

Accepted Answer

D. Moist environments

Answer

A. Arid land

Answer

B. Secluded environments

Answer

C. Aquatic habitation

Question 45

Which of the following substances pass through the root cell membrane by osmosis?

Accepted Answer

D. Water

Answer

A. Ceil sap

Answer

B. Carbon dioxide

Answer

C. Oxygen

Question 46

Thunderstorm can be beneficial to plants because it

Accepted Answer

D. adds nitrate to the soil

Answer

A. adds line to the soil

Answer

B. kills the pest that attacks crops

Answer

C. destroys some of the major crops

Question 47

The sum total of adaptive changes from pre-existing form that have taken place over a long time resulting in diversity of forms, structures and functions among organism is referred to as

Accepted Answer

D. Organic Evolution

Answer

A. Specification

Answer

B. Inorganic Evolution

Answer

C. Evolution

Question 48

Which of the following is an example of continous variation?

Accepted Answer

D. Height in humans

Answer

A. Human blood groups

Answer

B. Sex difference in human

Answer

C. Haemoglobin types

Question 49

Which of the following statement is correct about Southern Guinea Savanna in Nigeria

Accepted Answer

A. It is the largest of all the biotic community in Nigeria

Answer

B. It has no plants species

Answer

C. It has plants species like Iroko, Opepe etc

Answer

D. It has no trees

Question 50

Which of the following type of soil has the highest water retaining capacity?

Accepted Answer

C. Clay

Answer

A. Loam

Answer

B. Laterite

Answer

D. Sand

Question 51

The movement of blood between the heart and all other parts of the body beside the lungs is

Accepted Answer

D. Systemic circulation

Answer

A. Double circulatory system

Answer

B. Pulmonary system

Answer

C. Single circulation

Question 52

Ecology is best defined as the study of

Accepted Answer

B. The inter-relationship between living organisms and the environment

Answer

A. The characteristics of an environment

Answer

C. Living organisms in a particular area

Answer

D. The habitats and wild life

Question 53

The number of times an organism occurs within a given area of a habitat is referred to as

Accepted Answer

B. Population frequency

Answer

A. Population growth rate

Answer

C. Population growth rate

Answer

D. Population density

Question 54

Which of the following is the effect of using artificial pollination in plant breeding?

Accepted Answer

D. Improvement of the variety of crops

Answer

A. Production of healthy crops

Answer

B. Lengthening the maturity time of crops

Answer

C. Making crops susceptible to disease

Question 55

In natural selection, Darwin proposed that evolution occurred because of the following conditions except

Accepted Answer

D. food and other needs are abundant

Answer

A. that nature selects those that will survive to reproduce their kind

Answer

B. there is a fierce competition among the offspring

Answer

C. that the weaker offspring are eliminated

Question 56

Reading the verdict of a case by a magistrate is an example of

Accepted Answer

D. A voluntary action

Answer

A. A reflex action

Answer

B. An instinct

Answer

C. A conditioned reflex

Question 57

Which of the following is a behavioural adaptation that protects prey from predators?

Accepted Answer

C. Secreting irritating fluid

Answer

A. Hibernation

Answer

B. Shedding of leaves

Answer

D. Dormancy

Question 58

Which of the following statement about the similarities in plant and animal transport is correct?

Accepted Answer

A. Materials and hormones are transported in fluid form

Answer

B. The transport medium is made up of only tissues

Answer

C. Their materials are transported in the same vessels

Answer

D. Diffusion is not required

Question 59

Which of the following is an example of discontinuous variation?

Accepted Answer

B. Offsprings including two male cats and three female cats

Answer

A. The range in height of a pea plant from 30cm to 50cm

Answer

C. The colour of pear plants grown in the dark

Answer

D. The adult body weight ranging from 50kg to 95kg

Question 60

Animals are said to gregarious when

Accepted Answer

C. they are of the same species moving together in a group

Answer

A. they survive adverse conditions of cold weather

Answer

B. they transmit information from one individual to another

Answer

D. they give an alarm to alert others to show the normal protective behaviour of the group when danger threatens

Question 61

The above organism can be classified under which phylum in the animal kingdom

Accepted Answer

B. Chordata

Answer

A. Nematoda

Answer

C. Porifera

Answer

D. Annelida

Question 62

Which of the following will have the least effect on the rate of change of the numbers in a population

Accepted Answer

A. Mutation

Answer

B. Food Supply

Answer

C. Disease

Answer

D. Predation

Question 63

The glomerular filtrate contains the following except

Accepted Answer

C. Blood Corpuscles

Answer

A. Water

Answer

B. Urea

Answer

D. Glucose

Question 64

The association between two organisms living together in which only one benefits from the association while the other is neither benefited nor harmed is

Accepted Answer

C. Commensalism

Answer

A. Predation

Answer

B. Competition

Answer

D. Dispersal

2019 JAMB Biology Past Questions

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