Agronomy - Study Mode

[#831] Plankton, Nekton and Benthon are NOT the components of which one of the following ecosystems?
Correct Answer

(C) Grassland

Explanation

Solution: Plankton, Nekton and Benthon have aquatic emergence whether it is Marine water, freshwater or pond. These are not components of the Grassland ecosystem.

[#832] Which of the following phytohormone is involved in nutrient mobilization
Correct Answer

(C) Auxin

Explanation

Solution: Auxin is an important phytohormone that is a key regulator of plant growth and development, helps in overcoming apical dominance induced by auxins and stimulates the formation of chloroplast in leaves. It is also involved in the process of nutrient mobilization.

[#833] Sericulture means
Correct Answer

(B) Rearing of silkworms

Explanation

Solution: Sericulture is the process of rearing silkworms for silk production. Also termed Silk Farming. Sericulture has become an important cottage industry. Today, China and India are the two main producers with more than 60% world's annual production.

[#834] Which state has the largest acreage and highest production of sugarcane in country
Correct Answer

(C) Uttar Pradesh

Explanation

Solution: In India, Uttar Pradesh is the highest sugarcane producing state, which is why it is also known as the "Sugar bowl of India". The area under cultivation of sugarcane in the Uttar Pradesh is 22.77 Lakh hectares with a production of 135.64 million tons.

[#835] Temporary roots found in maize is known as
Correct Answer

(A) Seminal roots

Explanation

Solution: Maize plants show three types of roots: i. Adventitious roots: these are fibrous roots that develop from the lower nodes of the stem below the ground level which are the effective and active roots of the plant. ii. Seminal roots: it develops from radical and is temporary. iii. Brace or prop roots: produced from the lower two nodes to provide strength to the plant.