Correct Answer: D. rice grains

Correct Answer: C. 31 days

Correct Answer: C. 50% heterozygous

Correct Answer: A. wind

Explanation

(a) Explanation of animal nutrition: Animal nutrition refers to the art and science of feeding farm animals.

(b) Functions of oestrogen in animal reproduction:

- Stimulates the development of mammary gland.

- Influences the development of female secondary sexual characteristics.

- Determines the onset of heat.

- Promotes the production of ova/controls ovulation.

- Increases cilliary activity and mucous secretion in the oviduct.

- Increases blood supply and water content of the uterus.

(c) Explanation of methods of animal i? mprovement:

(i) Selection: This is the process of picking/choosing one or more animals with desired qualities from a group/population for breeding purposes.

(ii) Breeding: This is the mating of animals of the same species with the aim of transferring desirable qualities from parents to offspring.

(iii) Introduction: This involves bringinging exotic breeds of animals with desired qualities into a new environment.

(d) Meaning of ornamental plants: Ornamental plants are plants that are grown for the aesthetic values of their flowers, leaves, shapes etc /They are plants grown to beautify the environment.

(e) Vegetative methods that could be used to propagate ornamental plants:

- Cutting

- Budding

-Layering

- Grafting

- Marcotting

Correct Answer: D. 125kg

Explanation

(a)Explanation of the terms:

(i) Farmstead: Farmstead refers to a farm house and all its production and processing structures. OR 4 Farmstead is the farmer's dwelling place and production centre.

(ii) Secondary tillage: This involves breaking/loosening/pulverizing soil clods it obtain a fine tilth with the aid of implements such as barrow, ridger, cultivator etc.

(b) Function of tile parts of a mouldboard plough:

(i) Hitch -serves as the point of attachment to the tractor/work animal.

(ii) Furrow wheel

- Used for stabilising the rear end of the plough.

- Guides the direction of the plough and mouldboard.

(iii) Disc coulter:

- makes vertical cut/furrow in soil ahead of the plough.

(iv) Plough share:

- provides the cutting edge for the mouldboard plough.

-makes horizontal soil cuts.

(v) Mouldboard:

-used for the inversion of furrow slice/weeds.

(c) Description of natural process that takes carbon from the atmosphere:

- The process is photosynthesis.

- It is the process whereby green plants make use of carhon(iv)oxide and water to manufacture their food using the energy derived from the sun.

(d) Ways of replenishing plant nutrients in the soil:

- Liming

- Fallowing

- Cover cropping

- Crop rotation

- Organic manuring

-Application of inorganic fertilizer.

(e) Defficiency symptoms of calcium in crops:

- Stunting of die root system

- Weak slender plants.

- Appearance of pale yellow colour in leaves.

- Death of terminal buds

- Leaf tips become gelatinous.

(f) Soil organisms:

- Earthworms

- Nematodes

-Millipedes

- Bacteria

- Termites

- Fungi

-Centipedes

- Crickets Soldier ants.

Correct Answer: A. mould

Correct Answer: B. liming

Correct Answer: C. break down of soil structure