Correct Answer: D. Each micronucleus divides twice

Correct Answer: A. a wind vane

Explanation

Eight problems which an agricultural extension worker can face in the discharge of his duties are:

(i) Language barrier leads to improper dissemination of new innovations.

(ii) Inadequacy of well trained extension workers makes him have a wider area and more farmers than he can cope with.

(iii) Inadequate resources such as finance and materials tend to hinder his performance.

(iv) High level of illiteracy among farmers may slow down the rate of adoption of new innovations.

(v) Inadequate publicity - mass media are not often fully utilised in publicising extension programmes.

(vi) Poor transportation or lack of it retards the performance of the extension worker.

(vii) Insufficient motivation of extension worker by way of remuneration makes him reluctant to work.

(viii) Unfavourable attitude of rural farmers toward government programmes, makes adoption of new innovations difficult.

Correct Answer: B. Captivity

Correct Answer: B. 5\(\frac{5}{9}\)%

Explanation

% error = \(\frac{error}{\text{actual value}} \times 100\)

error = N72 - N68 = 4

actual value = N72

%error = \(\frac{4}{72} \times 100\)

= \(\frac{100}{18} = \frac{50}{9}\) = 5\(\frac{5}{9}\)%

Correct Answer: D. chitin

Correct Answer: B. volume

Explanation

The rate of evaporation depends on temperature, presence of wind, the humidity of the surrounding, and the surface area of the liquid exposed to the atmosphere. It doesn't depend on the mass of the liquid. The larger the surface area, the more would be the rate of evaporation.

Correct Answer: C. Trade union

Correct Answer: D. intricate

Correct Answer: D) They have the same chemical properties