Correct Answer: D. is not kept flexible to contemporary technology

Explanation

The process of egg formation in poultry is controlled by hormones. The egg is formed partly in the ovary and partly the oviduct. Yolk is formed In the ovary while other proteinous parts are formed in the liver and kidney. The yolk released by the ovary is taken up by infidibuIum and later moved to the oviduct where fertilization takes place The egg moves to the magnum, stay there for three hours and part of the albumen is formed. Chalaza is secreted round the yolk from the magnum. the egg moves to the isthmus where it stays for 1

Correct Answer: D. training of farmers children

Correct Answer: D. DNA modified to contain genes from different organisms

Explanation

The term recombinant DNA in biotechnology refers to DNA that has been modified or engineered to contain genes from different organisms. This process involves the insertion of specific genes or gene segments into the DNA of an organism, resulting in the creation of a new DNA sequence with combined genetic information.

Explanation

(a) Transplanting: (i) the transfer of seedlings from nursery beds to their permanent positions in the field. (ii) The tools used for transplanting are handtrowel, dibber, hoe or cutlass (iii) Plant is removed with a ball of soil around its roots (iv) Mostly done in cool weather, morning or evenings (v)Transplants require shading to reduce wilting (vi) Soil around roots at permanent site are firmed to eliminate air pockets for good root establishment (vii) Watering is done morning and evening (viii) Mulch after transplanting before maturity reduce evapotranspiration (ix) Usually done at the early stages of development of the crop plant, long before maturity (x) Weak or diseased seedling should not be transplanted (

b) Shading: (i) art of erecting cover above seedling (ii) protects seedlings from harsh external environmental conditions e.g. sun and rain drops (iii) reduces evapotranspiration (iv) shades are progressively removed until they are finally dispensed with (v) materials used for shading include palm fronds, tall grasses, tarpaulins etc.

(c) Supplying / filling-in: (i) the replacement of seeds that fail to germinate or seedling that dies (ii) is carried out to maintain desired plant population (iii) usually done by transplanting new seedlings or planting new seeds .in the site for the ungerminated seed (iii) usually manually done (iv) done within 2 weeks of 1st planting to obtain uniformity in growth/ growth uniformity.

(d) Nursery: (i) Nursery could be practiced in polypots, seed boxes and bed etc. (ii) Seeds which are smaller and or delicate or plants which are delicate(iii) while young require pre-planting sites known as nurseries (iv) is meant to have seedlings become adjusted to the harsh environment (v) Nursery sites should have good top soil with good drainage (vi) Seeds are mostly broadcast or drilled and lightly covered with soil (vii) Watering is done with a fine rose watering Can, (viii) All seed j boxes, beds, drills must be properly labelled ed (ix) Nurseries are usually shaded. (x) Usually enclosed or fenced (xi) Weeding, pest and disease control and application of fertilizer are usually practised in the nursery.

Explanation

(a) Meaning of elasticity of demand: This is the degree of responsiveness of demand to changes in price.

(b) Explanation of the terms as used in agricultural production:

(i) Collateral: This is anything of value offered as a promise of loan repayment to be given to a lender in case of non-payment.

(ii) Farm inventory record: This is a detailed list of all assets or materials on the farm including their money worth within a particular time.

(c) Merits and demerits of the retailer in the marketing of agricultural produce

Merits:

- They give credit to consumers

- Retailing provides job for many people

- They make goods readily available to consumers/repacking in small quantities

- They relay information from consumers to wholesalers

Demerits:

- They may suffer losses due to perishability of agricultural produce.

- They can create artificial scarcity of farm produce.

- They have little to offer for sale.

- They can inflate prices of farm produce.

- They may suffer losses due to pilfering by consumers.

(d) Roles of hormones in animal reproduction:

(i) Testosterone:

- Promotes sperm production.

- Stimulates the development of male secondary sexual characteristics.

- Regulates libido in male animals.

- Promotes the growth and development of accessory sex glands (e.g Cowper's gland).

- Prolongs the life of sperms in the epididymis.

(ii) Progesterone:

- Ensures the development of the uterus and implantation of the fertilized ovum.

- Inhibits oestrus during gestation and lactation.

- Sustains gestation/maintains pregnancy.

- Causes the development of alveoli in mammary gland.

(e) Ways of preserving fish:

- Salting

- Drying

- Freezing/refrigerating

- Frying -Smoking

- Canning

- Irradiation.

Correct Answer: B. 4.69kg

Correct Answer: D. improvement of yields

Correct Answer: D. in-planting operations

Correct Answer: A. cocoa,oilpalm,rubber and kola