GCE Advanced Level — Agricultural Science Quiz

Q1
During seed development in angiosperms, the triploid endosperm is formed by the fusion of:
One sperm cell with the egg cell
One sperm cell with the two polar nuclei
Two sperm cells with the egg cell
The pollen tube nucleus with the egg cell
The synergid with the antipodal cells
Q2
A researcher measures the respiration rate (mg CO₂ kg⁻¹ h⁻¹) of a fruit at daily intervals after harvest. The data show a sharp peak on day 4 followed by a decline. This fruit is most likely a
Non-climacteric fruit such as grape
Climacteric fruit such as banana
Non-climacteric fruit such as strawberry
Climacteric fruit such as lemon
Non-climacteric fruit such as pineapple
Q3
A farmer observed that onion (Allium cepa) bulbs reached maturity earlier when planted in June than when planted in December in the same location. Which of the following best explains this observation?
Onion is a short-day plant and flowers when days are short.
Onion requires high temperature for bulbing.
Onion is a long-day plant and forms bulbs when days are long.
Onion requires vernalization to initiate bulbing.
Onion bulbing is induced by high humidity.
Q4
The figure shows the typical drying curve of a food product. The axes are moisture content (wet basis) on the y-axis and time on the x-axis. The path from A to B shows a short initial warming period, B to C is a straight line with constant slope, and C to D is a curved decreasing slope leading to an equilibrium moisture content at D. Which segment represents the constant rate drying period?
A to B.
B to C.
C to D.
A to C.
There is no constant rate period.
Q5
In a paddy field, the central shoot dries up and can be easily pulled out, a symptom known as 'dead heart'. This damage is caused by the larva of a stem borer. To which order does this pest belong?
Diptera
Hemiptera
Lepidoptera
Coleoptera
Orthoptera
Q6
Which of the following is an example of a renewable and biodegradable packaging material?
Aluminium foil
Polyethylene (PE)
Glass
Polylactic acid (PLA)
Tinplate
Q7
The nitrogen-fixing cyanobacterium Anabaena azollae serves as a biofertilizer through its symbiotic association with which of the following?
Rice roots
Azolla fronds
Sugarcane stems
Legume nodules
Oil palm roots
Q8
A cutting that consists of a leaf blade or a leaf blade with a petiole is called a
stem cutting
root cutting
leaf cutting
leaf-bud cutting
hardwood cutting
Q9
Which mineral is an essential component of haemoglobin in red blood cells?
Calcium
Iron
Iodine
Potassium
Zinc
Q10
Which of the following market structures is characterized by many buyers and sellers, a homogeneous product, free entry and exit, and perfect information?
Monopolistic competition
Oligopoly
Monopoly
Duopoly
Perfect competition