Correct Answer: C. low wage rate

Explanation

Factors that can shift the demand curve for labor include: a change in the quantity demanded of the product that the labor produces; a change in the production process that uses more or less labor; and a change in government policy thataffects the quantity of labor that firms wish to hire at a given wage. When the payment for labour is low, fills will be willing to employ more people than with an increased wage rate

Correct Answer: A. 99.998

Explanation

(a) Ration is the total supply of feed given to an animal in a twenty-four hour period i.e. the amount of food taken an animal per day.

(b) Classes of livestock feeds and their characteristics are:

(1) Basal /Energy feeds or Carbohydrate concentrates: (i) high in carbohydrates or fats (energy). (ii) low in protein. (iii) low in fibre. (iv). low in miner (v) highly digestible (vi) it essentially provides high energy.

(2) Protein concentrates: (i) high in protein (ii) low 13 carbohydrates or fats (iii) low in fibre (iv) highly digestible (v) low in minerals.

(3) Roughages: (i) very high in fibre( low in digestible carbohydrates and energy (iii) low in protein (iv) poor or low digestibility.

(4) Minerals/ Vitamins Supplements: (i) low in energy (ii) for growth and development (iii) low in protein (iv) largely aids food digestion ( low in fibre (vi) largely aids resistance to diseases. (viii) high in vitamins/minerals. (c) Maintenance ration is a type of ration given to animals just - to maintain normal functioning of the body system, the animal is neither gaining n losing body weigh. Such ration is usually supplied to breeding animals when they are not breeding. Usually it is supplied to dry or non-lactating animals when they are not lactating. Production ration is a type of rationgiven to animals - for purpose of production. Usually they are supplied in excess of maintenance requirements to produce meat, eggs, milk, wool, work, etc.

Correct Answer: C. N545

Explanation

Husband contributions = \(\frac{7}{100}\) x N5,500 = N385

Wife contribution = \(\frac{4}{100}\) x N4,000 = N160

Sum of their Annual contribution = N385 + N160 = N545

Correct Answer: D. \(\frac{3}{2}\)

Explanation

For perpendicular vectors, their dot product = 0.

\((4i - kj). (3i + 8j) = 12 - 8k = 0\)

\(8k = 12 \implies k = \frac{3}{2}\)

Correct Answer: D. dumping

Correct Answer: C. pancreas

Correct Answer: B. large population

Explanation

(a) Explanation:

(I)Putrefaction: A process by which agents of decay/saprophytic/putrefying bacteria/fungi; decompose/breakdown; dead organic remains/waste products of other organisms; into ammonium compounds/nitrates.

(ii)Nitrogen fixation:The process by which free atmospheric nitrogen; is converted to nitrate in the soil; by thunder storm/bacteria in root noddles of legumes/soil.

(iii)Nitrification: The conversion of ammonia/ammonium compounds; to nitrites; then to nitrates; by denitrifying bacteria.

(iv)Denitrification: This is the conversion of nitrates; in the soil to atmospheric nitrogen; by nitrifying bacteria/ fungi.

(b)Differences between Nitrogen fixation and Denitrification

(c) How Nitrogen from Urine gets to the roots of plants: -

• When a person passes urine in the soil
• Ammonium compound/urea present in urine; is converted into nitrite
• by nitrifying bacteria/nitroso monas
• The nitrites are oxidized to nitrates
• by other nitrifying bacteria /nitrobacter
• Roots of plants absorb the nitrates.

Correct Answer: B. contain equal number of protons and electrons