Correct Answer: B. job seekers lack information where jobs exist

Correct Answer: A. 8

Explanation

(a) Reasons for good housing in poultry management are: (i) protection of birds against adverse weather condition (ii) protection of birds against disease attack. (iii) It assist in keeping birds in age groups for proper management. (iv) for protection of birds from thieves. (v) It protect birds from attack by wild animals and dangerous reptiles like snake and hawks (Pests attack). (vi) it enhances maximum productivity in birds. (vii) It increases the efficiency of feeds and feed utilization. (viii) facilitates management and veterinary care.

(b) Features of a poultry deep litter house are.

(i) the floor of the house is made of concrete.

(ii) walls are made of sandcrete /mud or zinc/ wood and usually about cm - 90 cm high.

(iii) roof is made of asbestos sheets, corrugated iron sheets or thatched.

(iv) space between walls and roof is covered with wire-nettings for good ventilation.

(v) the floor is uniformly covered with woodshavings to serve as litter for absorbing poultry droppings.

(vi) poultry equipment such as feeding and drinking troughs are placed convenient places inside the pen.

(vii) such equipment may be placed on the floor for the young chicks on raised platforms or of hung from the roofs for the older birds.

(viii) The number of birds housed depends on the size of the house and the age of birds, usually three adult birds to 1m² of floor space.

(ix) direction of wind and sunshine normally considered when siting the deep-litter house for illumination (East-West direction).

(x) disinfectant bath,or foot dips are usually provided at the entrance of the house to prevent introduction of disease pathogens by visitors.

(xi) litter is normally changed periodically as occasions demand to prevent disease build-up.

(xii) It may be partitioned in pens to house different age groups for convenience of management and avoidance of disease spread.

(xiii) adequate provision of laying nest.

(xiv) provision of gutter with insecticide-treated water around the house to prevent the attack of soldier ants.

Correct Answer: B. proscribed

Correct Answer: D. \(\sqrt{29}\)

Explanation

\(p = \begin{pmatrix} 2 \\ -2 \end{pmatrix} , q = \begin{pmatrix} 3 \\ 4 \end{pmatrix}\)

\(\frac{1}{2}p = \begin{pmatrix} 1 \\ -1 \end{pmatrix}\)

\(q - \frac{1}{2}p = \begin{pmatrix} 3 \\ 4 \end{pmatrix} - \begin{pmatrix} 1 \\ -1 \end{pmatrix} = \begin{pmatrix} 2 \\ 5 \end{pmatrix}\)

\(|q - \frac{1}{2}p| = \sqrt{2^{2} + 5^{2}} = \sqrt{29}\)

Correct Answer: C. promote members' welfare

Explanation

The major function of a trade association is the promotion and protection of its members. All of the businesses work together to help solve problems and come up with solutions to industry-related issues.

Correct Answer: B. Vitamin K

Correct Answer: B. open cast

Explanation

(a)(i) Second law of thermodynamics: This states that when there is conversion of energy from one form to another; there is always a loss/ decreases; in the amount of useful energy.

(ii) Flow of energy across different levels in a food chain

• Transfer of energy between trophic levels
• Is not 100% completely efficient
• Successive levels have less energy
• And support fewer organisms
• Primary producers/green plants have the highest energy
• When herbivores/ primary consumers feed on primary producers
• The energy level is reduced
• When carnivores/secondary consumers feed on herbivores
• The energy level is further reduced
• Part of the energy is lost as heat at each trophic level
• Not all parts of the preceding organisms are eaten by the predator/organism at the next trophic level; Energy is lost in the process of respiration/feeding/movement/metabolic active

(b)(i) Factors that can limit human populations: -

• Famine / scarcity of food
• diseases/epidemics
• increased mortality/death rate by wars /natural disasters emigration
• increase mortality - reduced natality/birth rate.

(b)(ii) Ways of overcoming the factors:

1. Famine: - Availability of food (through improved farming techniques)
2. Mechanized farming
3. improved storage facilities
4. Use of fertilizers/agro chemicals
5. Genetic engineering
6. Improved planting materials/seeds/stems etc.
7. Improved finance

Diseases:

• Health care
• Immunization
• Preventive drugs
• Improved diet
• Good sanitation.

Wars:

• Improved/enhanced communication/dialogue
• Mediation.
• Prohibition of illegal firearms
• Good governance Natural disasters
• study of the environment
• promote environmental friendly activities
• preservation of natural habitats
• Accurate and prompt forecast of disaster

Increased Mortality/death rate:

• Provision of balanced/good diet
• Good Medicare
• Adequate security
• Peaceful resolution of conflicts/prevention of wars
• Effective management of disaster

Emigration: -

1. Provide adequate food/shelter
2. Improved health/environment/sanitation
3. Urbanization/development
4. Reduced natality/Birth rate
5. Apply birth control methods
6. Legislation against abortion
7. Education/ awareness against sexual transmitted diseases (STD's):

Correct Answer: A. pure samples of the same compound contain the same elements combined in the same proportion by mass