Horticulture MCQ Question and Answer | Agriculture MCQ Question

The pink colour of the onion is due to Anthocyanin which belongs to the class of flavonoids.
Red onions contain anthocyanins in their epidermal cells, with the primary component of the 25 anthocyanins produced being cyanidin-3-O-glucoside, although a complex mixture of other cyanidin and peonidin derivatives are also present.

Stable form of papaya is Pistillate. Papaya is a polygamous plant with three basic types of flowers viz. staminate, pistillate and hermaphrodite (bisexual). Of these, only pistillate is stable, whereas flowers of hermaphrodite and male vary in sex expression under different environmental conditions.
The pistillate form of papaya has a flower that lacks stamens is pistillate. The pistillate flower of papaya is a pleurogynous unisexual form derived intraspecifically from a perigynous bisexual ancestor. It is a morphological anomaly in which the ovary consists of two cycles of carpels.

Knol-Khol is a stem vegetable. As with edible tubers, roots and leaves, some vegetables are edible stems also. Knol-Khol and asparagus are among them.
Radish is the root vegetable. Sweet potato is a swollen adventitious root.

The storage temperature of cucumber is 4° - 5°C.
A general rule for vegetables is that cool-season crops should be stored at cooler temperatures (32 to 35°F) and warm-season crops should be stored at warmer temperatures (45 to 55°F). As cucumber is a warm season crop so, needs to be stored at 4 - 5 degrees Celsius in the refrigerator.

The biggest cultivated fruit in the world is the Jack fruit. The jackfruit is not your typical fruit. It's got a distinctive, musky smell and a flavour that some describe as Juicy Fruit gum.
The Jack fruit (Artocarpus heterophyllus), is the largest tree fruit in the world. Native to the Indo-Malaysian region, this species now grows throughout tropical regions of the world. The largest fruits may reach nearly 3 feet (0.9 m) in length and weigh up to 75 pounds (34 kg).

Ploidy level in French Marigold is Tetraploid.
Ploidy level is a term referring to the number of chromosome sets in somatic cells of the diplophase (2N) or gametophytic cells of the haplophase (1N).
An organism whose somatic cells are tetraploid (four sets of chromosomes), for example, will produce gametes by meiosis that contain two sets of chromosomes.
The botanical name of the French marigold is Tagetuspatula. These plants grow dwarf with a plant height of 40 cm. The chromosome Number of this species is 2n = 48.

Long-day onion variety is Brown Spanish.
Long-day sweet and storage onion varieties do well in the northern states that have between 14 - 16 hours of daylight length.
Long-day sweet onion varieties generally mature a few weeks before long-day storage onion varieties and will keep from one to four months, so eat them first.

New Zealand spinach belongs to the family Aizoaceae.
Tetragonia tetragonioides, commonly called New Zealand spinach is a flowering plant in the fig-marigold family (Aizoaceae). It is often cultivated as a leafy vegetable.
Its natural habitat is sandy shorelines and bluffs. It is a halophyte and grows well in the saline ground. The plant has a trailing habit and will form a thick carpet on the ground or climb through other vegetation and hang downwards.

Durgapura Meetha, Durgapur Kesar and Pusa Bedana are the improved varieties of Watermelon.
Durgapura Meetha is released by ARS, Durgapura. It is a late cultivar maturing in 125 days with well-spread vines. Fruits are round with light green, the rind is thick with good keeping quality, flesh sweet and dark red. Average weight of the fruit is 6 - 8 kg.
Durgapura Kesar is released by ARS, Durgapura. It is also a late cultivar, fruit weight 4 - 5 kg, skin green with stripes and flesh yellow in colour, moderately sweet, and large seeds.
Pusa Bedana is a seedless watermelon developed at IARI, by crossing Tetra 2 (tetraploid) × Pusa Rasal.

A crop that is least tolerant to soil acidity is Okra.
Okra is tolerant of a wide range of soil pH but prefers soil with a pH between 6.0 and 6.8. Soils at or below 5.8 can result in okra with poorly developed pods, as it cannot tolerate acidic soil i.e. soil pH below 6.
If the soil pH is below 5.8, it should be limed to increase the pH to 6.0 or more.