WAEC Biology Practical Questions and Answers 2022/2023 (Complete Solution)

WAEC Biology Practical questions and solutions 2022. Many WAEC applicants find it hard to reply to the WAEC Practical Biology efficiently because they no longer know-how to answer the questions. I will display to you the nice manner to reply WAEC Biology Practical questions PDF and make an awesome grade for your Biology examination.

You want to apprehend the WAEC Biology Practical making scheme earlier than trying any query in order to gift your solutions in the sort of manner that it’ll appearance appealing to the examiner to earn you large marks.

Bear in thoughts that each unmarried technique is provided marks. So, make certain you do now no longer pass any step whilst reporting and imparting your sensible results. And consider to don’t forget that neat labeling could be very important.

You may be predicted to perform an test and file your observation. What you may see will now no longer be a ways from the WAEC Biology Specimen given for your school.

Note: Scroll to the lowest for today’s sensible Biology solutions.

WAEC Practical Biology Questions and Answers

Today’s WAEC Biology Practical Answers Loading…

(1ai)

A – Neck region

B – Chest region

C – Upper stomach region

(1aii)

A – It gives mobility and balance to the top whilst connecting it to the quite motionless thoracic backbone.

B – It holds the rib cage and protects the coronary heart and lungs

C – It helps the burden of the frame and permit positive movements, consisting of lifting objects.

(1bii)

(i) Transverse process – Functions because the web website online of attachment for muscular tissues and ligaments of the backbone in addition to the factor of articulation of the ribs

(ii) Centrum –  IIt helps maximum of the frame’s weight.

(iii) Neural backbone – It  gets sensory messages from tiny nerves

(iv) Neural canal – It permits the passage of the spinal cord

(1ci)

A – 7

B – 12

C – 5

(1cii)

(i) Sacral vertebrae

(ii) Caudale vertebrae

2a)

PLEASE TABULATE

= D

-Two observation-

(i) Gives greenish leaves

(ii) Gives a developing seedling

-Results-

Positive increase

= E

-Two observation-

(i) No increase observed

(ii) Wet soil

-Results-

Negative increase

= F

-Two observation-

(i) No increase observed

(ii) Dey soil

-Results-

Negative increase

= G

-Two observation-

(i) No increase observed

(ii) Extremely dry soil

-Results-

Negative increase

(2bi)

E – Excess water

F – Depletion of soil nutrient

G – Absence of water or soil moisture

(2bii)

(i) Well ventilated soil

(ii) Good and wealthy in nutrient soil

(4ai)

Phylum

L – Arthropoda

M – Arthropoda

(ii)

Class

L – Insecta

M – Insecta

(4bi)

(i)They have an exoskeleton or a difficult, shell-like protecting at the out of doors of its frame.

(ii)Insects have 3 primary frame elements: head, thorax, and stomach.

(iii)Insects have a couple of antennae on pinnacle in their heads.

(4bii)

(i)myriapods

(ii)arachnids

(iii)crustaceans

(4ci)

L

(i) It incorporates disorder vector that reasons malaria

(ii) The larva serves as meals to aquatic organisms

M

(i) The caterpillar of specimen M destroys vegetable crops

(ii) It facilitates in pollination

(4cii)

(i) Controlled through Mosquito Traps

(ii) Controlled through Space sprays

(iii) Controlled through Mechanical Barriers

(iv) Controlled through Vegetation Management.

(v) Controlled through out of doors measures.

(4d)

TABULATE PLS

– L (ADULT MOSQUITO)

(i) Smaller in size

(ii) A Pair of wings

(iii) Absence of difficult hind wings

(iv) Absence of maxillary palp/maxilla

(iv) Absence of spines on legs

– M(BUTTERFLY)

(i) Big in size

(ii) Two pairs of wings

(iii) Presence of difficult hind wings

(iv) Presence of maxillary palp/maxilla

(v) Presence of spines on legs

(4dii)

(i) Possession of wings

(ii) Possession of antenna

(iii) Possession of proboscis

(iv) Possession of segmented frame

(4e)

L – Terrestrial

M – Terrestrial

BIOLOGY PRACTICAL

Study Specimen A and B and solution query 1(a) to 1(c). (a)

(i) Name the habitat of every of specimens A and B.

(ii) Name the grownup level into which every of specimens A and B could develop.

(iii) Name of the phylum and sophistication not unusualplace to the grownup level of specimens A and B.

(b) State 3 observations functions of organic importance in;

(i) Specimen A;

(ii) Specimen B.

(c)(i) State 4 observable structural variations among specimens A and B.

(ii) State 3 observable similarities among specimens A and B.

WAEC Physics Practical

Check WAEC Timetable to recognise the subsequent examination

  1. Study Specimen C, D and F and solution questions 2(a) to 2(c).

(a) (i) Name the organism from which every of specimens C, D and E, are received.

(ii) State the characteristic not unusualplace to specimens C, D and 

(iii) State 3 observable functions which adapt specimen C to its characteristic.

(b) (i) State observable structural similarities in specimens C and D

(ii) State 3 observable structural variations among specimen C and D.

(c) Make a drawing, 6cm to 8cm lengthy of specimen C an label fully.

three. Study specimens K and L, and solution questions three(a) to three.

(a)(i) Name the floral a part of specimen K.

(ii) Indicate the quantity of floral elements in every whorl of specimen K.

(b) (i) Name the intercourse of specimen K.

(ii) Give one purpose for the solution in four(b)(i).

(c)(i) What is the symmetry of specimen K?

(ii) Give one purpose for the solution in four (c) (i).

(d) Name one pollinating agent of every of specimens K and L.

(e) State 4 observable variations among specimens, K and L,

(f) Make a drawing 8cm  to 10cm lengthy of the longitudinal phase of the specimen K and label fully.

BIOLOGY PRACTICAL ANSWERS

  1. (a) (i) Habitats of specimen A/ Larva of Mosquito: Stagnant water/swampy areas/poles/fringe of stream. Specimen B/Maggot: Rotting/rotten/decaying/decomposing animals/decaying meals/ human faeces/pit latrine.

(ii) Adult Stage of Specimen A/Larva of Mosquito: Mosquito/Anopheles mosquito/Culex mosquito/aedes mosquito. Specimen B/ Maggot; Housefly/Musca domestica.

(iii) Phylum and Class not unusualplace to Specimen A and B phylum: Arthropoda. Class: Insecta

(b) Observable functions of Biological importance in:

(i) Specimen A/ Larva of Mosquito:

Presence of spiracles; for respiratory/gaseous change

presence of siphon/respiratory trumpet/respiratory tube; for respiratory/ gaseous change

Presence of antennae; for sensitivity

Horny jaw/mouth; for chewing stable foods

Mouth brushes; for sweeping meals into its mouth

Presence of bristles; to stay afloat/buoyancy/protection/defense

Feather-like/feathery hair for defence

Long/cylindrical frame; for wriggling movement;

Presence of eyes, for vision/sight/seeing.

(ii) Specimen B/Maggot:

Hook on the mouth; for movement;

Presence of eyes; for vision/

(Small) spiny pad; for movement;

(Small) mouth; for feeding, -Two pairs) of spiracles for respiratory gaseous change.

(c)(i) variations among Specimen A and B

Specimen A/ Larva of Mosquito                                              Specimen B/ Maggot

Mouth brushes gift                                                             mouth brushes are absent

bristles gift                                                             bristles are absent

anal gills gift                                                          anal grills are absent

anterior give up now no longer pointed                                                           anterior give up is pointed

posterior give up now no longer blunt/wide                                        posterior give up is blunt/wide

has antennae                                                                absence of antennae

3 frame divisions/Head, Thorax, Abdomen                        Two frame divisions/head, and trunk

has one spiracle                                                           has pairs of  spiracles

hook absent                                                                 hook is gift

siphon/respiratory trumpet/                                            siphon/respiratory trumpet

tube gift                                                                 tube absent

pad absent                                                                   pad gift

eye gift                                                                  eye absent

(ii) Similarities among specimen A and B; – They each have segmented frame;

they each own spiracle

they each have mouth

each have elongated/lengthy frame/cylindrical

2(a)(i) Name of organism wherein specimens C/Gill, D/Lung and E/leaf are received, specimen C/ Gill; Tilapia/Catfish

Specimen D/Lung: Goat/Cow/Guinea pig

Specimen E/Leaf: -Mango plant/cashew plant/orange plant

(ii) Function not unusualplace to specimen C/Gill, D/Lung and E/Leaf: -Gaseous change respiration

(iii) Observable functions that adapt specimen C to its characteristic: -it’s far moist; for diffusion of dissolved gases/gaseous change; -it’s far skinny-walled/skinny membrane; tomake diffusion easy; – it’s far richly provided with blood vessels/blood capilaries/rather vascularized as diffusion medium/for gaseous change; -Has a massive floor area; to boom the fee of diffusion of gases.

(b)(i) Observable Similarities Between Specimens C, and D: -Both have a mouth of capillaries/are rather vascularized; -Both are pink/crimson in colour/Have minted surfaces; -are skinny-walled membrane -Have massive floor area.

(ii) Observable structural variations among specimens C and D

Specimen C/Gill                                                           Specimen D/Lung

Gill Rakers Present                                          Gill Rakers Absent

Gill Arch/Bar Present                                       Gill Arch/Bar Absent

Gill Lamella Present                                         Gill Lamella Absent

Gill Filaments Present                                      Gill Filaments Absent

Pleural Membrane Absent                                Pleural Membrane Present

Pleural Cavity Absent                                      Pleural Cavity Present

Not Fluffy                                                       Fluffy/Soft

three(a)(i) Floral elements of Specimen K/Pride of Barbados flower: -Sepals/calyx; -Petals/corolla: – Stamen/androecium; -Pistil/gynoecium/carpel. (ii) Number of Floral elements of Specimen K/Pride of Barbados flower: -Sepals/Calyx: 5/four + 1 -Petals/corolla 5/four + 1 -Stamen/androecium: 10 -Pistil/gynoecium/carpel 1

(b)(i) Sex of Specimen K/Pride of Barbados flower; Hermaphrodite/bisexual (ii) Reason for the solution in b (i) it has each stamen and pistil/male and woman organs/androecium and gynoecium.

(c)(i) Symmetry of Specimen K/Pride of Barbados flower: Bilateral/bilaterally symmetrical.

(ii) Reason for the solution in (c)(i): it is able to be reduce into same halves alongside handiest one plane. (d) Name of pollinating agent of specimens K/Pride of Barbados flower and L/Elephant grass: Specimen K/Pride of Barbados: Butterfly/Bees, Specimen L/Elephant grass: Wind

(c) observable variations among Specimens K and L

Specimen K/Pride of Barbados flower                         Specimen L/Elephant grass

Flowers are conspicous/massive                                       Flowers are inconspicous/small

Brightly colored flowers/yellow/crimson                           Dull colored flowers/green

Scented flowers                                                                       Not scented flowers

massive/sticky pollen grains                                             small/mild pollen grains

stigma is sticky                                                                        stigma isn’t always sticky

The 2021 WAEC Biology Practical Questions and Answers (expo) may be published right here at the day of the Practical Biology examination earlier than the examination starts. The above questions and solutions are strictly for exercise displaying the way to gift your solutions

Keep checking and reloading this web page for today’s WAEC Biology Practical solutions (Bio Practical expo). WAEC 2021 Practical Biology Answers Loading…

Today’s WAEC Biology Practical solutions.

(1ai) (2020 Answers)

TABULATE

– TEST: Specimen B + 2drops of iodine solution

– OBSERVATION: No precipitate is found (No response is occurring)

INFERENCE: It suggests specimen B includes no starch content

(1aii)

TABULATE

– TEST: Specimen B + 2ml of NaOH(aq) + three drops of CuSO4 + shake

– OBSERVATION: The combination will flip to pink or violet colour

– INFERENCE: Protein is gift

(1b)

(i) Test for starch

(ii) Test for protein (Biurets test)

(1c)

– Additional profits is received thru exceptional mushrooms

– They incorporate nutrients and proteins and Laos acts as antioxidants helping the immune system

(1di)

Fungi

(1dii)

– Eukaryotic organism

– Absence of chlorophyll

– Cell partitions product of chitin in preference to cellulose

(1diii)

– Molds

– Mildews

– Smuts

– Rusts

– Yeast

(1ei)

Mullosca

(1eii)

– Presence of tentacles

– Possession of tender and unsegmented bodies

– Body is included through a mantle and she’ll

– They are bilaterally symmetrical

– They are triploblastic with 3 layers

(1fi)

– Specimen C (mushrooms) are decomposers breaking down floor waste freeing nitrogen again into the soil in shape of ammonium nitrate, a nutrient critical for plant survival

(1fii)

Saprophytic mode of nutrition

(2a)

E: Succulent Fruit

F: Berry/Flesh Fruit

H: Legume/Pod

(2b)

E: Parietal Plancentation

F: Axile Plancentation

(2c)

E: Human

F: Animal

H: Explosive Mechanism

(2di)

Specimen E appeal to birds, squirrels, and different small mammals. Consumption of the fruit will cause dispersal of the seeds in feces (through human)

(2dii)

(i)Vitamin C

(ii)Magnesium

(2ei)

Green

(2eii)

It means that they’re nonetheless young

(2fi)

Marginal placentation

(2fii)

(4a)

TABULATE

– Specimen P-

– Test: 2 drops of specimen P in water

– Observation time(seconds): three-four seconds earlier than it dissolves

– Medium of spread: Water

– Sense organ: Eye

-Specimen Q-

– Test: Teaspoon of specimen Q + water

– Observation time(seconds): Dissolves inside sixty five seconds

– Medium of spread: Water

– Sense organ: Eye

-Specimen R-

– Test: Cut phase of specimen R

– Observation time(seconds): 2 seconds or nearly immediately

– Medium of spread: Air

– Sense organ: Nose

(4b)

Osmosis

4c)

(i)

– Increase in temperature

– Difference in concentration

(ii)

– Molecular size

– Increase in temperature

(iii)

– Increase in temperature

– Difference in concentration

(4di)

(4dii)

It is Whorl

(4diii)

– Loop

– Whorl

– Arch/Compound

(4div)

– Crime detections

– Identification of individuals

– Genetic version in man

(4dv)

Discontinuous version

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