2020 WAEC BIOLOGY PRACTICAL SPECIMENS ANSWER FOR ALL CANDIDATE

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Specimen H – Complete green pod of Pride of Barbados Plant

The botanical name of Specimen H

It Is Caesalpinia Pulcherrima

Floral Part of Specimen H

I. Sepals/calyx

II . Petals / Corolla

III. Stamen/androecium

IV. Pistil / gynoecium

Structure of specimen H

1. Flower are conspicuous /large
2. Brightly coloured plants / greens
3. Stigma is sticky

Domestic uses of specimen H

1. it is used for beautification
2. For medical purpose
3. As a source f income

Economic  Importance of Specimen H

1. Environmental; Ornamental
2. Medicines
3. Vertebrate poisons; mammals

The symmetry of Specimen H

Bilateral/Bilaterally Symmetrical (because it can be cut into equal halves along only one plane)

Sex of Specimen H

Hermaphrodite/bisexual ( because it has both pistil / male and female organs /androecium and gynoecium).

Specimen H  Diagram: Complete green pod of Pride of Barbados Plant

Specimen E – Transverse Section of  Ripe Paw Paw

Botanical name of Specimen E : Carica papaya

Classification of Specimen E

It is classified as a type of fleshy fruit

Structure of Specimen E

It consist of three layers which are

1. Epicarp
2. Mesocarp and
3. Endocarp

N:B – The type of fleshy fruit of specimen E is berry

Economics Important of Specimen E

1. It has a high nutritive and medicinal value
2. it is used in the production of cosmetic beauty product
3. They are good source of potassium

Mode of dispersal of specimen E

By small Animals

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Source of Food of Specimen E

Vitamin A and C

Characteristics of Specimen E

1. They have pleasant aroma
2. The skin colour of Specimen E range from green to yellow.
3. Specimen E can be easy press with your thumb.

Specimen E  Diagram: Transverse Section of  Ripe Paw Paw

Specimen D – Giant land Snail

Habitat of Specimen D

Specimen D lives in shrublands, agricultural areas, plantations, garden, wetland e.t.c

Phylum – Mollusca

Class – Gastropoda

Observation Features that adapt Specimen D to its habitat

Lungs – Adapt to on land habitat through the use of lungs that take in oxygen.

Shells  – for protection

Tentacles – for vision and feelings

Rasp tongue – for consumption and digestion

Foots – for movement inland habitat

Economic Importance of Specimen D

1. They eat very low on the food web
2. they provide food for all sorts of mammals, birds earthworm e.t.c
3. They cause great disaster to farmers crop
4. they consume rotten vegetation like most leaf.

Mode of the feeding of Specimen D

Is by Scraping and they mostly feed on leaves and insect

Sex of Specimen D

They exhibit Hermaphrodite / Bisexual (The snail with bigger shell are mainly female)

Specimen D  Diagram: Gaint Land Snail

 Similarities Between Specimen F (tomatoes) and Specimen G (fresh pod of cowpea)

Both have annual life cycle

Both have seeds present

They both have plantation present

Differences Between Specimen F (tomato) and Specimen G (fresh pod of cowpea)

Specimen f (tomato)                                                      Specimen G (fresh pod of cowpea)

1. Specimen F Is a fleshy fruit while Specimen G is a dry dehiscent fruit
2. Specimen F Has axial placentation while Specimen G has a marginal placentation
3. Specimen F Mode of dispersal is by an animal while Specimen G Mode of dispersal is by explosive mechanism
4. Specimen F have Absence of epigeal germination while Specimen G presence of epigeal germination

Similarities Between Specimen E  (pawpaw) and Specimen H (pride of Barbados plant)

1. They both serves as a source of medicine

Differences Between Specimen E  (pawpaw) and Specimen H (pride of Barbados plant)

Specimen E is a berry ( fleshy fruit)  while Specimen H is a dry dehiscent fruit

Specimen E consists of epicarp, mesocarp, and endocarp while Specimen H consists of sepals, petals, stamen, pistil

Specimen E serves a source of refreshment  while Specimen H serves as beautification

Specimen E colour range from green to yellow while Specimen H range from orange to

Specimen G – Fresh pod of cowpea plants

Botanical Name:  Vigna Unguiciulata

Family: Fabaceae

Classification of Specimen G

Specimen G is classified as Dry fruit

Process of germination of specimen G

Germination of specimen G is exhibited by epigeal germination, i.e during germination, the cotyledons ( seed leaves)  are carried above the soil

Economic Importance of Specimen G

1. it serves as a source of food
2. it serves as a source of income
3. it is proteinous
4. It is resistance to drought
5. it helps to prevent erosion

The life cycle of specimen G

Life cycle: Annual

Placentation of Specimen G

It has marginal placentation e.g  of fruit with similar placentation are soya beans, pride of Barbados and flamboyant

Uses of Specimen G

1. the green seeds can be used as a substitute for coffee
2. the leaves can also serve as vegetable dishes
3. it can be used as green manure

Dispersal of Specimen G

The mode of dispersal of Specimen G is by an explosive mechanism

 Specimen F – Transverse Section of ripe Tomato Fruit

Classification of Specimen F       

Specimen F is classified as fleshy fruits ( fruit crops)

Botanical Name: Solanum Lycopersicum

Life Cycle of Specimen F

The life cycle is Annual

Structure of Specimen F

It consists of three layers which are

1. Epicarp
2. Mesocarp and
3. Endocarp

N:B – The type of fleshy fruit of specimen E is berry

Placentation of Specimen F

It has Axial placentation e.g of fruit with similar placentation are garden egg, orange, pepper e.t.c

Mode of dispersal of Specimen F

It is mainly dispersed by Animals

Source of food by Specimen F

Vitamin

Uses of Specimen F

1. Used for industrial purposes
2. create employment opportunity
3. serve as regeneration of source of income

 Specimen F – Transverse Section of ripe Tomato Fruit

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