Waec Gce 2018 Agric (Practical) Answers – Jan/Feb Expo-EXAMWAVES

1ai)

To determine the presence of microorganisms

in a soil sample

1aii)

Conical flask I : At the end of the Experiment ,

the lime water in Conical flask I will turn milky

Conical flask II : At the end of the experiment,

the lime water in Conical flask II will remain

clear

1aiii)

Fresh soil contains living organisms

1aiv)

-They improve soil structure

-They improve soil aeration

1b)This Experiment is Artificial Propagation by

Growth

1biii.

– pollination agent which can be fail to

perform successfully are not required

– the hazards of fertilizatiom are avoided

– the new plants mature fast because the

offspring tend to acquires the age of the

parent

– the offspring are true to types because there

is no mixture of hereditary characters.

1c)There is increase in photosynthesis

activities

DISADVANTAGES

-Leads to high evaporation content in plant.

2a-Solar Power(Sun)

2b

I)it is used in drying process

Ii)it can produce electricity

Iii)it is used in heating farm steads

2c

Advantages:

I)It is easily available

ii)It is a very neat source of power

iii)it is very useful in farm photosynthesis

Disadvantages

I)it is expensive to store and harness

ii)The energy from the sun can be erratic.its

not possible to control

it

iii)only available during the day

2d

I)Electrical power

II)Solar power

III)Mechanical power

Iv)Human power

V)Water power

3a)

I-comb

II-wattle

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