Correct Answer: D. 20,000

Correct Answer: C. 15 years

Explanation

Cost Price (N) = 20000

Salvage value (N) = 5000

Annual depreciation (N) = 1000

Total depreciation = 15000

The formula to calculate the useful life is:

Useful life = (Cost Price - Salvage value) / Annual depreciation

Now, let's plug in the values:

Useful life = (20000 - 5000) / 1000

Useful life = 15000 / 1000

Useful life = 15 years

Therefore, the useful life represented by Y in the table is 15 years.

Correct Answer: D. land

Correct Answer: C. Chicken

Explanation

A monogastric is an animal with a single-compartmented stomach. Examples of monogastrics include humans, poultry, pigs, horses, rabbits, dogs and cats. Most monogastrics are generally unable to digest much cellulose food materials such as grasses.

Explanation

(a) (i) Graph showing the relationship between fertilizer used and tomato yield. The relationship between fertilizer used and tomato yield

Scale{x-axis 2cm rep. 2 units y-axis 2cm rep. 2 units

(ii)Description of the relationship between fertilizer used and tomato yieldAs more fertilizer is applied to the tomato farm, total output (yield) first increases sharply but after a point, further addition of fertilizer results in reduction in yield of tomato.

(iii) Most appropriate quantity of fertilizer to be applied on the tomato farm - 6 bags of fertilizer

(b) Effects of subsidy withdrawal on agricultural production-Reduction in agricultural production - High cost of farm produce - Reduction in number of farmers/creates unemployment - Discourages investment in agricultural production - High cost of farm inputs

(c) Print media that could be used to disseminate information about new varieties of maize to farmers - Newspapers -Handbills -Posters -Bulletins -Magazines -Pamphlets -Journals -Periodicals -Banners -Flyers -Billboards -Newsletters -Proceeding -Leaflets

(d) Insect pests of crops

(i)MaizeStem borer - Locust Weevil - Cotton stainer - Aphid - Leaf hopper - Grasshopper - Earworm

(ii)Orange - Thrips - Red - mite - Scale insect - Aphid - Fruit borer - Caterpillar - Mealy bug - Leaf hopper - Fruit fly - Citrus Butterfly - Leaf Miner - Moth

Explanation

(a)(i) Igneous rocks are formed as a result of hot molten magma escaping to earth surface and cooling. On reaching the surface, the rocks cool to form glassy o.r coarsely crystalline textured mass. Some of the magma may cool before reaching the earth surface thus forming plutonic rocks while some may reach the surface to form volcanic rocks. Rapid cooling gives rise to fine grained rocks, while slow cooling gives raise to larger grained rocks.

(ii) Sedimentary rocks are formed when pre-existing rocks are broken down by geological denudation agents. The materialsproduced are moved from their places of origin and deposited elsewhere as solid particles or in solution. The particles are usually laid down in strata or beds and they are usually cemented together by organic matter, cementing agents or pressure. They contain fossils.

(iii) Metamorphic rocks are derived from pre-existing sedimentary or igneous rocks by the agent of metamorphism such as heat, pressure and chemical change. The changes often take place at some depth within the earth's crust, e.g. earth movements and folding subject rocks to great heat and pressure and new rocks of new types called metamorphic rocks are produced. Under the new conditions, some of the original minerals are no longer stable and they give place to other minerals fitted for the new environment.

(b) Examples of igneous rocks are: Granite, diorite, gabbro, basalt, syenite, pumice. Examples of metamorphic rocks are: Gneisss, schist, quartzite, marble, slate. Examples of sedimentary rocks are: limestone, sandstone, coal, clay, dolomite, shale, mudstone, peat, lignit, gypsum.

Correct Answer: D. increasing the number of peasant farmers

Correct Answer: D. list of market centres

Correct Answer: B. 100% tall

Correct Answer: C. temperature