UTME CBT FREE Practice Test – Biology

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The inheritable characters that are determined by a gene located only on the X-chromosome is _____

A. homozygous   B. dominant   C. recessive   D. sex-linked.

One adaptation of Cactus opuntia to conserve water is the reduction of _______

A. Leaves to spine   B. Flower size   C. Internodes   D. Stem to leaves

The study of how and why population size change over time is ______

A. population estimation.   B. population dynamics.   C. population ecology.   D. population cycles.

The structural adaptation of desert plants for water conservation is ________

A. Spiny leaves
B. Prominent stomata in leaves
C. Broad leaves with numerous stomata
D. Spongy mesophyll

In Spirogyra, the pyrenoid _______

A. excretes waste products   
B. is suspended by cytoplasmic strands   
C. is mainly used for respiration     
D. usually contains starch

Which of the following organisms is multicellular’?

A. Chlamydomorias.   B. Spirogyra.   C. Amoeba.   D. Euglena.

Seed plants are the most dominant vegetation on land because of ________

A. their motile gametes.
B. their ability to photosynthesize.
C. efficient seed dispersal.
D. availability of water.

The diagram is the transverse section of a ______

A. MonocotyIedonous stem.
B. Dicotyledonous stem
C. Monocotyledonous root
D. Dicotyledonous root.

An organism at the start of a food chain which provides the total input of energy into an ecosystem is the _____

A. sun.    B. producer.    C. consumer    D. decomposer.

The structure of the cell membrane is a

A. double layer and a double protein layer.
a. middle bi-layer of protein with a lipid layer on either surface.
C. middle bi-layer of lipid with a protein layer on either surface.
D. protein layer with two inner lipid layers

In a mammal, stimulus is transferred from the receptor muscle to the central nervous system
through the _______

A. motor neurons     B. effector muscles     C. dendrites     D. sensory neurons

The part labelled II is called ______

A. endocarp.    B. endosperm.    C. epicarp.    D. mesocarp

The diagram below illustrates a part of the mammalian skeleton.

The function of the part labelled I is to

A. provide support to the spinal cord.
B. provide surface for attachment of the muscle.
C. carry the spinal cord.
D. articulate with adjacent vertebrae.

The process of transforming the chemical energy of cellular fuels into the high energy bonds of ATP in plants is _______

A. Photolysis   B. Respiration   C. Autotrophism   D. Photosynthesis

The part labelled I is called _______

A. acromion process.    B. collar bone.    C. glenoid cavity.    D. scapula blade.

Study the diagram below:

The mode of nutrition of the plant in the diagram is

A. photosynthetic and chemosynthetic.
B. saprophytic and carnivorous.
C. photosynthetic and carnivorous.
D. chemosynthetic and saprophytic

A couple has 10 children, all female. Which of the following best explains the situation?

A. The sex determination was by the man’s X chromosome.
B. The man’s sperm count is low.
C. The woman is not capable of producing male children.
D. The sex determination was by the man's Y chromosome.

The part of the brain responsible for peristalsis is the _____

A. olfactory lobe.   B. medulla oblongata.   C. hypothalamus.   D. thalamus.

How many chromosomes will be in a gamete if the normal cell has four chromosomes?

A. 2     B. 4     C. 6     D. 8

The young proglottid is represented by ______

A. Ill.    B. IV.    C. l    D. II.

In vascular plants, the sieve tubes and companion cells are present in the ______

A. cambium.   B. cortex.   C. xylem.   D. phloem.

According to Darwin, evolutionary change is by ________

A. adaptation.     B. geographical isolation.     C. gene flow.     D. natural selection.

The gas evolved in the process is

A. oxygen   B. carbon (II) oxide   C. carbon (IV) oxide   D. nitrogen.

Blood platelets are important because they _______

A. are amoeboid and nucleated
B. produce antitoxins
C. produce antibodies
D. release thrombin for blood clotting.

A relationship between living organisms which is of mutual benefit is _______

A. parasitism    B. saprophytism    C. ecosystem    D. symbiosis

Adaptive radiation is illustrated in _______

A. modified insect mouthparts.
B. dentition in mammals.
C. wings in birds and bats.
D. appendages in insects.

The diagram below is an illustration of a crocodile.

Two characteristic features of the class to which the crocodile belongs are labelled

A. I and II.    B. III and IV.    C. II and IV.    D. II and V.

In mammals, the function of the sebaceous gland is to ______

A. produce sweat
B. secrete sodium chloride
C. secrete water
D. produce an oily substance

A student used the following steps in testing for a non-reducing sugar:

I. added Benedict’s solution to the sugar solution;
II. added dilute hydrochloric acid to the sugar solution and boiled it;
III. added sodium hydroxide solution to the solution in II and boiled;
IV. added Benedict’s solution to the cooled solution in lll

What is the importance of step II in the testing process? To

A. neutralize the sugar solution.
B. soften the sugar solution.
C. change the colour of the sugar solution.
D. increase the acid content of the sugar solution

In an experiment to determine the percentage of humus and water in a soil sample, the following results were obtained;

Weight of the evaporating basin alone = 80.5g
Weight of basin and soil = 101.5g
Weight after drying the soil in the oven = 99.0g
Weight of basin and roasted soil = 95.5g

The percentage of humus in the soil sample is _____

A. 26.7%    B. 16.2%    C. 16.7%    D. 17.6%.

Which of the following is true of leucocytes?

A. They are large and nucleated.
B. They are involved in blood clotting
C. They are respiratory pigments.
D. They are most numerous and ramify all cells.

The blood circulatory system of vertebrates consists of ______

A. Heart, aorta, arteries and veins
B. Heart, vena cava, arteries and veins
C. Heart, arteries, capillaries and veins
D. Heart, aorta, capillaries and veins

The genetic make-up of an organism is described as _______

A. allele.   B. chromosome    C. phenotype.     D. genotype.

The part marked X is used for

A. breathing.    B. feeding.    C. reproduction.    D. sucking

The organelles present in cells that are actively respiring and photosynthesizing are _______

A. Nucleus and centrioles
B. Mitrochondria and chloroplast
C. Lysosomes and ribsomes
D. Golgi apparatus and endoplasmic reticulum

The removal of undigested food substances from the body is called ______

A. assimilation.    B. egestion.    C. elimination.    D. excretion

Which of the following forms about 55% of the volumes of the blood in man?

A. Plasma   B. Erythrocytes   C. Leucocytes   D. Platelets

The wings of a bat and those of a bird are examples of _____

A. continuous variation    B. divergent evolution    C. convergent evolution    D. coevolution.

A circulatory system is very essential in mammals but not in smaller organisms like Amoeba
because _______

A. Amoeba lives in freshwater.
B. diffusion is sufficient to transport materials in Amoeba.
C. Amoeba lacks food containing haemoglobin.
D. Amoeba exhibits anaerobic respiration.

The main structure in vertebrates that supports and protects the body is the _______

A. Muscle   B. Joint   C. Skeleton   D. Ligament

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