Explanation

(a) The causative agent of: (i) Foot and mouth disease is virus (ii) Rinderpest disease is virus (iii) Newcastle disease is virus

(b) Three animals that can be affected by each of the diseases in (a) above are: (i) Foot and Mouth disease - Cattle, Sheep and Goat. (ii) Rinderpest disease - Cattle, Pig, Sheep. (iii) Newcastle disease - Domestic fowl, Turkey, Duck.

(c) Four symptoms of foot and mouth disease are: (i) Formation of blister on the mucous membrane of the mouth (ii) Lameness (iii) Inflammation of the teats and udder (iv) Lesion in the interdigital spaces of the hoofs.

Three symptoms of Rinderpest disease are: (i) High fever (ii) Difficult breathing and loss of weight (iii) Loss of appetite and high mortality. Three symptoms of Newcastle disease are: (i) Nervous disorder or twisting of the neck (ii) Presence of greenish diarrhoea (iii) High mortality and low egg production.

Correct Answer: B. deposition of rocks particles in layers

Correct Answer: B. Adjectival phrase

Correct Answer: B. independent inter-relationship existing among them

Correct Answer: B. 617

Correct Answer: D. Zuhr

Correct Answer: B. Hydra

Explanation

\(3x^{2} + 5x + 1 = 0\)

\(x^{2} + \frac{5}{3}x + \frac{1}{3} = 0\)

\(\alpha \beta = \frac{c}{a}\)

= \(\frac{1}{3}\)

\(\alpha + \beta = \frac{-b}{a}\)

= \(-\frac{5}{3}\)

\((\alpha + \beta)^{3} = \alpha^{3} + 3\alpha^{2} \beta + 3\alpha \beta^{2} + \beta^{3}\)

\(\therefore \alpha^{3} + \beta^{3} = (\alpha + \beta)^{3} - 3\alpha^{2} \beta - 3\alpha \beta^{2}\)

= \((\alpha + \beta)^{3} - 3\alpha \beta (\alpha + \beta)\)

= \((-\frac{5}{3})^{3} - 3(\frac{1}{3})(-\frac{5}{3})\)

= \((-\frac{125}{27}) + \frac{5}{3}\)

\(\therefore (\alpha^{3} + \beta^{3}) = -\frac{80}{27}\)

\(27(\alpha^{3} + \beta^{3}) = 27(-\frac{80}{27})\)

= -80.

Correct Answer: A. client

Correct Answer: C. inelastic demand

Explanation

Inelastic demand in economics is when people buy about the same amount whether the price drops or rises.