Year :
2015
Title :
Agric Science
Exam :
JAMB Exam
Paper 1 | Objectives
21 - 30 of 48 Questions
| # | Question | Ans |
|---|---|---|
| 21. |
Close to the time of harvesting of cotton, sunshine is needed to ensure the production of bolls that are A. big B. Bright C. not mouldy D. not open Detailed SolutionOption B is correct because sun lighting helps to brighten cotton bolls that are bright which depicts good quality. |
|
| 22. |
Agriculture contributes to the economy of West African countries through the following means except A. Reduction of poverty through job creation B. Supply of armament for territorial defence C. Provision of foreign exchange D. supply of raw materials to industries Detailed SolutionOption B is correct because Agriculture is not used in supply of armed weapons (i.e. armament) |
|
| 23. |
In animal production, newly-born rabbits are called A. Bunnies B. Kids C. Pouts D. Lambs Detailed SolutionOption A is correct because bunnies are young rabbits. |
|
| 24. |
Which of the following crops has a fibrous root system? A. cotton B. coffee C. cowpea D. sugarcane Detailed SolutionOption D is correct because monocotyledon plants all have fibrous root and sugar cane is a monocot. |
|
| 25. |
Which of the following insects transmits swollen shoot disease of cocoa? A. steam borer B. Mealybug C. white fly D. scale insect Detailed SolutionOption B is correct because mealy bug transmits swollen shoot disease. |
|
| 26. |
Soil water that is available for root absorption at field capacity is A. Capillary water B. hygroscopic water C. Gravitational water D. superfluous water. Detailed SolutionOption A is correct because plant roots absorbed water through capillary action. |
|
| 27. |
The weight of a sheep increased from 25kg to 45kg in two months. A. 1 : 1 B. 1 : 2 C. 3 : 1 D. 4 : 1 Detailed SolutionFeed Conversion Ratio (FCR)= (Mass gained)/(Mass of feed) = Mass Gained = 45kg – 25kg = 20kg = Mass of feed = 60kg = FCR = \(\frac{20}{60}\) = \(\frac{1}{3}\) = 1 : 3 |
|
| 28. |
Which of the following statements is correct about micro-nutrients? They A. Promote formation of only root nodules B. are required by plants in very small quantities C. are fixed into the soil through microbial activity D. increase crop tolerance to pest attack. Detailed SolutionOption B is correct as micro nutrients are those nutrients required in small qualities by plants (iron, zinc etc) |
|
| 29. |
Yellow colouration of the lower leaves of a growing maize plant may be due to deficiency in A. potassium B. phosphorus C. zinc D. nitrogen Detailed SolutionOption B is correct because when plant is lacking phosphorus, its leaves become yellow. |
|
| 30. |
The following crops will enrich the soil with nitrates except A. Calopogonium B. pueraria C. centrosema D. Axonopus Detailed SolutionOption D is correct because it doesn’t have nitrogen. Option A, B, C are incorrect because they are all legumes and have nitrogen to produce nitrates. |
| 21. |
Close to the time of harvesting of cotton, sunshine is needed to ensure the production of bolls that are A. big B. Bright C. not mouldy D. not open Detailed SolutionOption B is correct because sun lighting helps to brighten cotton bolls that are bright which depicts good quality. |
|
| 22. |
Agriculture contributes to the economy of West African countries through the following means except A. Reduction of poverty through job creation B. Supply of armament for territorial defence C. Provision of foreign exchange D. supply of raw materials to industries Detailed SolutionOption B is correct because Agriculture is not used in supply of armed weapons (i.e. armament) |
|
| 23. |
In animal production, newly-born rabbits are called A. Bunnies B. Kids C. Pouts D. Lambs Detailed SolutionOption A is correct because bunnies are young rabbits. |
|
| 24. |
Which of the following crops has a fibrous root system? A. cotton B. coffee C. cowpea D. sugarcane Detailed SolutionOption D is correct because monocotyledon plants all have fibrous root and sugar cane is a monocot. |
|
| 25. |
Which of the following insects transmits swollen shoot disease of cocoa? A. steam borer B. Mealybug C. white fly D. scale insect Detailed SolutionOption B is correct because mealy bug transmits swollen shoot disease. |
| 26. |
Soil water that is available for root absorption at field capacity is A. Capillary water B. hygroscopic water C. Gravitational water D. superfluous water. Detailed SolutionOption A is correct because plant roots absorbed water through capillary action. |
|
| 27. |
The weight of a sheep increased from 25kg to 45kg in two months. A. 1 : 1 B. 1 : 2 C. 3 : 1 D. 4 : 1 Detailed SolutionFeed Conversion Ratio (FCR)= (Mass gained)/(Mass of feed) = Mass Gained = 45kg – 25kg = 20kg = Mass of feed = 60kg = FCR = \(\frac{20}{60}\) = \(\frac{1}{3}\) = 1 : 3 |
|
| 28. |
Which of the following statements is correct about micro-nutrients? They A. Promote formation of only root nodules B. are required by plants in very small quantities C. are fixed into the soil through microbial activity D. increase crop tolerance to pest attack. Detailed SolutionOption B is correct as micro nutrients are those nutrients required in small qualities by plants (iron, zinc etc) |
|
| 29. |
Yellow colouration of the lower leaves of a growing maize plant may be due to deficiency in A. potassium B. phosphorus C. zinc D. nitrogen Detailed SolutionOption B is correct because when plant is lacking phosphorus, its leaves become yellow. |
|
| 30. |
The following crops will enrich the soil with nitrates except A. Calopogonium B. pueraria C. centrosema D. Axonopus Detailed SolutionOption D is correct because it doesn’t have nitrogen. Option A, B, C are incorrect because they are all legumes and have nitrogen to produce nitrates. |