Agronomy - Study Mode

[#401] Golden rice is a rich source of
Correct Answer

(A) Vitamin A

Explanation

Solution: Golden Rice is a variety of rice produced through genetic engineering. It biosynthesizes beta-carotene, a precursor of vitamin A in edible parts of rice. That is why Golden rice is considered a rich source of Vitamin A. Vitamin A deficiency causes Xeropthalmia, a condition such as night blindness. Thus, it can be given as a substitute to fulfill the need for vitamin A in our body.

[#402] Paddy crop can be successfully grown under water-logged condition because
Correct Answer

(C) Needed O 2 is supplied from the foliex part of paddy to the roots

Explanation

Solution: Paddy crops can be successfully grown under water-logged conditions because the needed oxygen is supplied from the follies part of the paddy to the roots. The Rice plant is adapted to waterlogging by forming aerenchyma and a barrier to radial oxygen loss in the roots.

[#403] Which one of the following crops causes maximum reduction in soil alkalinity
Correct Answer

(A) Paddy

Explanation

Solution: Alkali soils are clay soils with high pH greater than 8.5. Alkali soil is a poor soil structure and a low infiltration capacity. Beans, Beet, Cauliflower, Garlic, kale and pea are the vegetables that can be grown in alkaline soils. Whereas some crops increase the alkalinity of the soil and paddy is one of them.

[#404] Which one of the following is a hybrid variety of maize
Correct Answer

(D) Sangam

Explanation

Solution: Maize is a cereal grain first domesticated by indigenous people in Southern Mexico. Maize has shown tremendous growth over the years especially since 2006 - 07, after the adoption of single cross hybrids, high quality seeds and improved technologies in the field. Out of 234 cultivars of maize, 132 are hybrids developed since 1961. Sangam is one of the hybrid varieties of maize.

[#405] Non-nodulating Groundnut lines lack
Correct Answer

(D) Root hairs

Explanation

Solution: Groundnut belongs to the family legume and it has a variety of both nodulating as well as non-nodulating phenotypes. Non-nodulating lines of groundnut lines lack Root hairs while root hairs are observed at the site of lateral root emergence in nodulating groundnut.