JAMB Agricultural Science Past Questions & Answers - Page 11

51.

What are the main differences between monocot and dicot plants?

A.

Monocots have parallel leaf veins, while dicots have branched leaf veins

B.

Monocots have flower parts in multiples of three, while dicots have flower parts in multiples of four or five

C.

All of the above

D.

Monocots have fibrous root systems, while dicots have taproot systems

Correct answer is C

Monocots and dicots are differentiated by several characteristics. Monocots have parallel leaf veins, while dicots have branched leaf veins. This is due to the different growth patterns of the two types of plants. Monocots have flower parts in multiples of three, while dicots have flower parts in multiples of four or five. This is due to the different evolutionary paths of the two types of plants. Monocots have fibrous root systems, while dicots have taproot systems. This is due to the different needs of the two types of plants, with monocots typically being grasses and cereals that benefit from a fibrous root system, and dicots being broad-leaved plants that benefit from a taproot system.

52.

The following are necessary operations in maize cultivation except?

A.

Weeding

B.

Thinning

C.

Nursery practices

D.

Fertilizer application

Correct answer is C

Maize is cultivated by direct seeding, hence, nursery practice is not needed in maize cultivation.

 

53.

The main aim of mechanized agriculture is

A.

Reducing maturation time for crops

B.

Decreasing number of pests

C.

Having a large land area for cultivation

D.

Reducing cost of production

Correct answer is C

The major objective of mechanized agriculture is to have a large land area for cultivation.

54.

Which of the following farm practices is not mechanized?

A.

Planting

B.

Fertilizer application

C.

Bush clearing

D.

Transplanting

Correct answer is D

Transplanting is not a mechanized farm practice, i.e it does not involve the use of machinery.

 

55.

What is soil conservation, and why is it important in agriculture?

A.

Soil conservation involves the removal of topsoil for agricultural purposes

B.

Soil conservation refers to the preservation and sustainable management of soil resources

C.

Soil conservation aims to maximize crop yields through intensive farming practices

D.

Soil conservation focuses on increasing soil fertility through the use of chemical fertilizers

Correct answer is B

Soil conservation is the practice of protecting and managing the soil to prevent erosion, degradation, and loss of fertility. It involves implementing various techniques and practices to ensure the long-term sustainability and productivity of agricultural lands.