Horticulture - Study Mode

[#636] Medicinal plant used for extraction of steroids for oral contraceptives preparation is
Correct Answer

(A) Medicinal Yam

Explanation

Solution: The medicinal plant used for extraction of steroids for oral contraceptive preparation is Medicinal Yam . Medicinal yams are robust, perennial, branched, climbers native to tropical Asia, Africa and South America. The underground rhizomes or tubers contain alkaloids like diosgenin, and pannogenin and are used for the synthesis of antiarthritic, anti-inflammatory, antifertility and anabolic drugs.

[#637] Scientific name of Oyster mushroom is
Correct Answer

(A) Pleurotus ostreatus

Explanation

Solution: The scientific name of the Oyster mushroom is Pleurotus ostreatus . It is a common edible mushroom. Pleurotus spp. is generally referred to as the oyster mushroom because the pileus or cap is shell-like and spatulate and the stipe is eccentric or lateral. The oyster mushroom is widespread in many temperate and subtropical forests throughout the world. Pleurotus ostreatus Kummer is one of the best-known species among the oyster mushrooms.

[#638] Delayed harvesting in radish may cause
Correct Answer

(B) Pithiness

Explanation

Solution: The correct answer is Option B: Pithiness . Here's why: * Pithiness means the radish root becomes spongy, less juicy, and develops an undesirable texture. This happens because the plant is putting energy into reproduction (going to seed) instead of keeping the root tender. * Delayed harvesting allows the radish to mature beyond its prime eating stage, leading to this pithiness. Let's look at the other options: * Forking: Forking (splitting into multiple roots) is usually caused by obstacles in the soil or uneven moisture during root development, not delayed harvesting. * Deformed root: Deformed roots can be caused by poor soil conditions, pests, or diseases, but are less directly related to *when* you harvest. * High pungency: While pungency (spiciness) can increase slightly with age, delayed harvesting primarily affects the texture (pithiness) rather than dramatically increasing the pungency. Pungency is more influenced by variety and growing conditions. Therefore, the most direct consequence of delaying radish harvesting is pithiness.

[#639] Which fruit is known as "Miracle fruit of China"
Correct Answer

(A) Kiwi fruit

Explanation

Solution: "Kiwi Fruit" is the fruit that is known as the "Miracle fruit of China". The Kiwi fruit is native to China and its centre of origin is in the mountain ranges of South Western China where it occurs naturally as a deciduous fruiting vine. Kiwi fruit or Chinese gooseberry ( Actinidia deliciosa ) is known as "China’s miracle fruit and the Horticultural wonder of New Zealand". The fruit has a refreshing and delicate flavour, a pleasing aroma, and high nutritive and medicinal value, rich in vitamin C and contains more potassium, phosphorus, iron, and is low in calories.

[#640] Which of the following is not an anti gibberellin or growth retardant?
Correct Answer

(D) Benzyl adenine

Explanation

Solution: Benzyl adenine is not an anti-gibberellin or growth retardant. It is a first-generation synthetic cytokinin that elicits plant growth and development responses, setting blossoms and stimulating fruit richness by stimulating cell division. It is an inhibitor of respiratory kinase in plants. Gibberellin is a plant hormone found in seeds, young leaves and roots that cause excessive growth.