Horticulture MCQ Question and Answer | Agriculture MCQ Question

Metaxenia is commonly observed in the Date fruit plant.
Metaxenia is caused by the direct action of pollen on the character of the fruit which consists of the ovarian tissues of the mother plant.
SWINGLE and NIXON discovered this phenomenon in fruits of the date palm and the former named it “metaxenia”.
Each male exerts approximately the same effect on the fruit of all varieties and exerts the same effect in different years. This direct effect of the pollen on the parts of the seed and fruit lying outside the embryo and endosperm.

The economic part of Senna is both leaf and pods.
Senna is an herb. The leaves and the fruit of the plant are used to make medicine. When cultivated as a medicinal herb, the plants are cut down semi-annually, dried in the sun, stripped, and packed in palm-leaf bags.
Senna contains many chemicals called sennosides. Sennosides irritate the lining of the bowel, which causes a laxative effect.

Potato contains 17 mg of Vitamin-C, per hundred grams of edible portion.
Potato is a major world food crop and by far the most important vegetable crop in terms of quantities produced and consumed worldwide. It is popularly known as the “Vegetable King”.
It is low in fat content (0.1%) but rich in several micronutrients, especially vitamin C. Potato is a moderate source of iron, and its high vitamin C content promotes iron absorption.

Characteristics of apomictic seedlings are True to type.
Apomixis is an asexual means of plant reproduction and is found in many species, especially in fruit crops. The process does not involve the union of male and female gametes and therefore there is no genetic recombination.
Apomictic seedlings are identical to the mother plant and similar to plants raised by other vegetative means because such plants have the same genetic make-up as that of the mother plant.

Symptoms of calcium deficiency in plants are 1^st noticed in terminal leaves.
Symptoms of calcium deficiency first appear on younger leaves and tissues, growth is inhibited, and plants have a bushy appearance. The youngest leaves are usually small and misshapen with brown chlorotic spots developing along the margins, which spread to eventually unite in the centre of the leaves.

King of Spices is Black pepper.
Black pepper (Piper nigrum) is known as the "King of Spices" because of its strong aroma and is widely used in all major cuisines around the world. Black pepper is cultivated for its fruit which is usually dried and then used as a spice or seasoning known as a peppercorn.

The citrus fruit variety is to be patented for the first time in Ruby.
The 1929 U.S. 'Ruby Red' (of the 'Redblush' variety) was the first grapefruit patent. The 1929 'Ruby Red' patent was associated with real commercial success, which came after the discovery of a red grapefruit growing on a pink variety.
These are slightly flattened, globular-shaped fruits with yellow-orange rinds and a sweet, tart flavour profile. This summer citrus tree bears fruit from mid-June to mid-September, making them a popular late summer treat to beat the heat.

The highest rate of ethylene synthesis is seen in Passion fruit.
Passion fruits are the highest ethylene producers among all fruits with a production range of 160 - 370 µl/kg hr at 20°C (68°F) at their climacteric peak.
Exposure of mature-green passion fruits to 100 ppm ethylene for 1 - 2 days accelerates their ripening.

The red pigment in tomatoes is due to lycopene.
Lycopene is a type of organic pigment called a carotenoid. It is related to beta-carotene and gives some vegetables and fruits (e.g. tomatoes) a red colour. Lycopene is a powerful antioxidant that might help protect cells from damage.
Lycopene is a powerful antioxidant with many health benefits, including sun protection, improved heart health and a lower risk of certain types of cancer.

Pusa Hybrid-9, a hybrid of the Brinjal crop was released from IARI, New Delhi, India. The fruit of this variety are oval round, glossy attractive, dark purple, and peduncle partially pigmented.
The average weight is 300g. Takes 90 days from sowing to 1^st Picking. The average yield is 670 q/ha.
Recommended for Gujarat and Maharashtra in 1997.