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

WAEC Biology Practical Questions and Answers 2022/2023. Many WAEC applicants struggle to accurately answer the WAEC Practical Biology questions because they don’t grasp the questions. I’ll show you how to answer WAEC Biology Practical questions PDF in the best way possible so you may get a good result on your Biology exam.

Before trying any question, you must first comprehend the WAEC Biology Practical Making Scheme in order to present your answers in such a way that they would appeal to the examiner and get you high marks.

Keep in mind that each process receives a grade. So, when reporting and presenting your practical outcomes, make sure you don’t neglect any steps. Also, keep in mind that proper labeling is extremely crucial.

You will be required to conduct an experiment and submit your findings. What you’ll see is quite similar to the WAEC Biology Specimen your school received.

Note: For today’s practical Biology answers, scroll to the bottom of the page.

WAEC Practical Biology Questions and Answers

Today’s WAEC Biology Practical Answers Loading…

(1ai)
A – Neck region
B – Chest region
C – Upper abdomen region

(1aii)
A – It provides mobility and stability to the head while connecting it to the relatively immobile thoracic spine.
B – It holds the rib cage and protects the heart and lungs
C – It supports the weight of the body and allow certain movements, such as lifting objects.

(1bii)
(i) Transverse process – Functions as the site of attachment for muscles and ligaments of the spine as well as the point of articulation of the ribs
(ii) Centrum –  IIt supports most of the body’s weight.
(iii) Neural spine – It  receives sensory messages from tiny nerves
(iv) Neural canal – It allows 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 growing seedlings

-Results-
Positive growth

= E
-Two observation-
(i) No growth observed
(ii) Wet soil

-Results-
Negative growth

= F
-Two observation-
(i) No growth observed
(ii) Dey soil

-Results-
Negative growth

= G
-Two observation-
(i) No growth observed
(ii) Extremely dry soil

-Results-
Negative growth

(2bi)
E – Excess water
F – Depletion of soil nutrient
G – Absence of water or soil moisture

(2bii)
(i) Well ventilated soil
(ii) Good and rich in nutrient soil

(4ai)
Phylum
L – Arthropoda
M – Arthropoda

(ii)
Class
L – Insecta
M – Insecta

(4bi)
(i)They have an exoskeleton or a hard, shell-like covering on the outside of its body.
(ii)Insects have three main body parts: head, thorax, and abdomen.

(iii)Insects have a pair of antennae on top of their heads.

(4bii)
(i)myriapods
(ii)arachnids
(iii)crustaceans

(4ci)
L
(i) It carries disease vector that causes malaria
(ii) The larva serves as food to aquatic organisms

M
(i) The caterpillar of specimen M destroys vegetable crops
(ii) It helps in pollination

(4cii)
(i) Controlled by Mosquito Traps
(ii) Controlled by Space sprays
(iii) Controlled by Mechanical Barriers
(iv) Controlled by Vegetation Management.
(v) Controlled by outdoor measures.

(4d)
TABULATE PLS

– L (ADULT MOSQUITO)
(i) Smaller in size
(ii) A Pair of wings
(iii) Absence of hard 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 hard 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 body

(4e)
L – Terrestrial
M – Terrestrial

BIOLOGY PRACTICAL

Study Specimen A and B and answer question 1(a) to 1(c). (a)

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

(ii) Name the adult stage into which each of specimens A and B would develop.

(iii) Name of the phylum and class common to the adult stage of specimens A and B.

(b) State three observations features of biological significance in;

(i) Specimen A;

(ii) Specimen B.

(c)(i) State four observable structural differences between specimens A and B.

(ii) State three observable similarities between specimens A and B.

• WAEC Physics Practical
• Check WAEC Timetable to know the next exam

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

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

(ii) State the function common to specimens C, D and E.

(iii) State three observable features which adapt specimen C to its function.

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

(ii) State three observable structural differences between specimen C and D.

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

3. Study specimens K and L, and answer questions 3(a) to 3.

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

(ii) Indicate the number of floral parts in each whorl of specimen K.

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

(ii) Give one reason for the answer in 4(b)(i).

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

(ii) Give one reason for the answer in 4 (c) (i).

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

(e) State four observable differences between specimens, K and L,

(f) Make a drawing 8cm  to 10cm long of the longitudinal section 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/edge of stream. Specimen B/Maggot: Rotting/rotten/decaying/decomposing animals/decaying food/ 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 common to Specimen A and B phylum: Arthropoda. Class: Insecta

(b) Observable features of Biological significance in:

(i) Specimen A/ Larva of Mosquito:

• Presence of spiracles; for breathing/gaseous exchange
• presence of siphon/breathing trumpet/breathing tube; for breathing/ gaseous exchange
• Presence of antennae; for sensitivity
• Horny jaw/mouth; for chewing solid foods
• Mouth brushes; for sweeping food into its mouth
• Presence of bristles; to remain afloat/buoyancy/protection/defense
• Feather-like/feathery hair for defence
• Long/cylindrical body; for wriggling movement;
• Presence of eyes, for vision/sight/seeing.

(ii) Specimen B/Maggot:

• Hook at the mouth; for movement;
• Presence of eyes; for vision/
• (Small) spiny pad; for movement;
• (Small) mouth; for feeding, -Two pairs) of spiracles for breathing gaseous exchange.

(c)(i) differences between Specimen A and B

Specimen A/ Larva of Mosquito                                              Specimen B/ Maggot

Mouth brushes present                                                             mouth brushes are absent

bristles present                                                             bristles are absent

anal gills present                                                          anal grills are absent

anterior end not pointed                                                           anterior end is pointed

posterior end not blunt/wide                                        posterior end is blunt/wide

has antennae                                                                absence of antennae

three body divisions/Head, Thorax, Abdomen                        Two body divisions/head, and trunk

has one spiracle                                                           has two pairs of  spiracles

hook absent                                                                 hook is present

siphon/breathing trumpet/                                            siphon/breathing trumpet

tube present                                                                 tube absent

pad absent                                                                   pad present

eye present                                                                  eye absent