WAEC Biology Practical Questions and Answers 2021/2022 PDF Download

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WAEC Biology Practical Questions and Answers 2021/2022 PDF Download

Are you writing the SSCE Examination for this academic year? Be it WAEC, NECO, GCE, you need to know the exact set of questions that you will be tackling. This article provides information regarding the WAEC Biology Practical Questions and Answers.

WAEC Technical Drawing Questions and Answers

WAEC Technical Drawing Questions and Answers

The student are eagerly awaiting their practical exams and a material like this is the perfect handout which applicants need in other to prepare properly while waiting for the Exams.

Likely and repeated WAEC Biology Practical Questions and Answers

Question 1

LIST OF SPECIMENS
Specimen A     –           twig of mango plant.
Specimen B     –           twig of Ixora plant.
Specimen C     –           leaf of Hibiscus plant.
Specimen D     –           hibiscus flower.
Specimen E     –           green leafy vegetable.
Specimen F     –           a piece of freshly cut beef.
Specimen G    –           worker bee (wet preserved).
Specimen H     –           soldier termite (wet preserved).
Specimen K    –           adult cockroach (wet preserved).
Specimen L     –           nymph of cockroach (wet preserved).
Specimen M    –           young toad (freshly preserved).
Specimen N     –           scale of bony fish.
Specimen P     –           freshly preserved mammalian skin preferably of goat or ram with hair/fur measuring at least 4 cm by 4 cm                       placed in a petri dish.
Specimen S               a small amount of garden soil in a petri dish.
Specimen T                orange/lemon/lime/citrus fruit
Specimen V               tomato fruit.
Specimen W              cassava tuber.
Specimen Xi               stem of young cassava plant measuring at least 10cm in length.
Specimen Xii              stem of young cassava plant measuring at least 10cm in length as in Xi.

QUESTION  1
Study specimens Aand Bcarefully and use them to answer questions
                        1(a) to 1(e).

(a)        Classify specimen B into its Division and Class.

(b) (i)  State the types of leaf arrangements in specimens A and B.
(ii) Name the leaf shape of specimens A and B.

(c) (i)   State the type of leaf margin in specimen A.
(ii)            State the types of venation found in the leaves of specimens A and B.                                                                                                                                                                           
(d) (i)   List three observable similarities found in specimens A and B.
(ii)   In a tabular form, state four observable differences between specimens A and B.                                                                                                               

    1.     (e)        Make a drawing 8 cm – 10cm long of the leaf of specimen

A

     and  label fully.

Observation

Most candidates could not classify specimen B/twig of Ixora plant into its Division and Class and many that tried could not spell correctly. Most candidates could not answer questions (b) (i) and (ii); (c) (i) and (ii) correctly.

Many candidates could state observable similarities in specimens A and quite well.

Only a few of the candidates’ drawings were good in question 1(e). Many candidates drew without putting the title of the diagram, the magnification and labelled correctly.

The expected answers are:

      • (a) (i) Division

Angiospermatophyta/Angiospermophyta/Magniliophyta
(ii) Class
Dicotyledoneae/Magniliopsida

(b) (i) Types of leaf arrangements
Specimen A     –           Alternate/Spiral
Specimen B     –           Decussate/Opposite

(ii) Leaf shape
Specimen A     –           Lanceolate/Sword-like
Specimen B     –           Oval/Ovate

(c) (i) Type of leaf margin of specimen A
Entire/Smooth/Wavy
(ii) Types of venation found in Specimens and B
Specimen A     –           Net/reticulate                                                                                                              Specimen B     –           Net/reticulate

(d) (i) Observable similarities between Specimens A and B

      • Leaves have leaf stalk/petiole/petiolate;
      • Leaf stalk/petiole swollen at the base;

 

      • Leaves contain chlorophyll/are green in colour;
      • Leaves have entire/smooth margins;
      • Leaves have net/reticulate venation;
      • Leaves have pointed apex;
      • Leaves have prominent midrib;
      • Both leaves are simple.

(ii) Observable differences between Specimens A and B

Specimen A (mango) Specimen B (Ixora)
  • Petiole/leaf stalk is long
Petiole/leaf stalk is short;
  • Leaves have elongated apex/accuminate/acuminate
Leaves have short apex/acute;
  • Leaves have a narrow lamina/leaf blade
Leaves have a broad lamina/leaf blade;
  • Spiral/alternate leaf arrangement
Decussate/ opposite leaf arrangement;
  • Leaves are bigger
Leaves are smaller;

Penalty: minus (-) 1 mark for no tabulation.

(e) Drawing/Diagram of leaf of specimen A
TL- Title

Quality
NL- Neat Labels
CL- Clarity of Lines
Sz- Size (8-10cm)
Mg- Magnification (x0.2 – x0.5)/ (x1/5 – x½)

Details
TA= Tapering Apex
NV=Net venation shown
MT= Midrib tapering to Apex
LS= Lanceolate Shape

Labels

    1. Apex/tip; midrib/rachis/main vein; vein; margin/edge; leaf blade/lamina; petiole/leaf stalk.
    1.                                                                                                                                                       [9

Question 2

 

Study specimens G and H carefully and use them to answer
                        questions 2(a) to 2(c).

(a) (i)   Name the phylum of specimens G and H.

[1 mark]

(ii)   State two reasons for the answer given in 2(a)(i)                                 [2 marks]

(b)        Name the structures on specimens G and H that are used for defense [2 marks]

(c)

(i) State the habitat of each of specimens G and H.                                   [2 marks]
(ii) State two ways in which each of specimens G and are of economic importance.
[4 marks]

Study specimens M, N and P carefully and use them to answer questions 2(d) to 2(e).

(d) (i)   Name the Class of organisms to which each of specimens M, N and P are associated.                                                                                               [3 marks]
(ii)  State one function common to the specimens named in 2 (d) (i).         [1 mark]

(iii) In a tabular form, state four observable differences between specimens and P.                                                                                                                                                     [4 marks]
(e) Explain three features of biological importance in specimen M.                 [6 marks]

 

Observation

Many candidates could answer this question properly but some could not spell the Phylum of specimens G and H properly while some candidates started the spelling of the phylum in small letter. Also the reason given for the answer in (a) (i) was incorrect.

Many candidates could state the structures on specimens G and used for defense. Many could also state the habitat of specimens G and and the economic importance.

Many candidates could not answer question (d) (i) and (ii) correctly. Candidates could answer question (d) (iii) well but (e) was not answered properly because they did not state the structures and functions.

 

 

The expected answers include:           

  • (a) (i) Phylum of specimens G and H

Arthropoda
NOTE: If two answers are given and one is wrong, mark both wrong.
(ii) Reasons

  • Presence of jointed legs/appendages;
  • Presence of chitinous exoskeleton;
  • Metamerically segmented;
  • Bilateral symmetry;
  • Have three body layers/triploblastic.

(b) Structures of specimens G and H used for defence
G         –           Sting/Ovipositor;
H         –           (Strong and powerful/biting) mandible/jaw.

(c) (i) Habitats of specimens G and H
G         –           (Bee) Hive
H         –           Termitarium/anthill/termite mound/nest/soil/old logs of trees/timber of wooden buildings.
(ii) Economic importance of Specimens G and H

G

–           It pollinates flower;
–           produces honey;
–           produces wax;
–           sting causes pain/death
–           bee keeping is a source of employment/income.

H

–           it destroys wood/furniture/books;
–           it destroys crops/plants;
–           the termitarium is used for lawn tennis court;
–           source of food/protein.
–           aids soil aeration through tunneling;
–           enhances penetration of water into the soil/increases porosity;
–           introduces vegetable/plant matter into the soil/increases humus contents;
–           their mound/termitarium forms impediments to land use.

(d) (i) Class of organisms to which specimens MN and P belong

M        –           Aves
N         –           Osteichthyes
P          –           Mammalia

(ii) Common features of specimens MN and P
Protection of the organism (against mechanical injury/desiccation)

(iii) Observable differences between specimens M and P

Specimen M/Quill feather Specimen P/Mammalian skin with hair
– Presence of inferior umbilicus absence of inferior umbilicus;
– Presence of superior umbilicus absence of superior umbilicus;
– Presence of after shaft absence of after shaft;
– Presence of shaft/rachis absence of shaft/rachis;
– Presence of Quill/calamus
– Presence of barbs
absence of Quill/calamus;
absence of barbs;
– Absence of hair/fur presence of hair/fur;
– Texture is hard when touched texture is soft when touched;
– Barbs are restricted to certain parts of the Quill Hairs/fur cover the whole surface of the specimen.

Penalty: minus 1 mark for no tabulation.

(e) Structures of biological importance in Specimen M
– Presence of Quill feather; serves as water proof/protection/keeps the bird warm/insulation;
– vane is flat/broad; to provide surface area for flapping during flight/against desiccation;
– rachis/shaft which is centrally placed; to provide point of attachment to barbs/strengthen the feather;
– barbs with hooks; interlock to form the vane;
– the overlapping arrangements of Quill feathers over the body of birds; allows smooth movement/little resistance in flight;
– colouration of the Quill feather; enhances courtship display/camouflage.
NOTE: Correct structure alone can score one mark.
  Correct structure and function to score two marks.

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