Agronomy - Study Mode
[#251] Wheat is originated in
Correct Answer
(B) Central Asia (Turkey)
Explanation
Solution: Wheat is a cereal grain and worldwide staple food. The archaeological record suggests that wheat was first cultivated in the regions of the fertile crescent around 9600 BCE. It originated in the Mediterranean region, the "Cradle of civilization" in the Tigris and Euphrates river valleys. While according to genetics, the origin of modern wheat is found in the Karacadag mountain region of what is today southeastern Turkey.
[#252] Which hormone is used for degreening of citrus fruits?
Correct Answer
(B) Ethylene
Explanation
Solution: Ethylene is the chemical hormone used for degreening of citrus fruits. Degreening is the process of removal of green colour from the skin of citrus fruit to show it is ripe and increase its market value. In this process, the measured amounts of ethylene gas are exposed to fruits under a controlled environment with specific temperatures and humidity.
[#253] How many agroclimatic zones are categorized in India
Correct Answer
(D) 15
Explanation
Solution: The agricultural land area of India is divided into 15 agro-climatic zones and further divided into 72 more sub-divisions. It is based on soil type, climates, rainfall, etc. These are: 1. Western Himalayan division 2. Eastern Himalayan division 3. Lower Gangetic plain region 4. Middle Gangetic plain region 5. Upper Gangetic plain region 6. Trans-Gangetic plain region 7. Eastern plateau and hill region 8. Central plateau and hill region 9. Western plateau and hill region 10. Southern plateau and hill region 11. East coast plain and hill region 12. West coast plain and hill region 13. Gujarat plain and hill region 14. Western plain and hill region 15. Island region
[#254] Plants with roots capable of penetrating into rocks is termed as
Correct Answer
(C) Chasmophyte
Explanation
Solution: Plants with roots capable of penetrating rocks are termed chasmophytes. Chasmophytes grow in the fissures in rocks where soil or organic matter has accumulated. These plants are also known as Lithophytes, which grow in the crevices of rocks. Xerophytes are the plants that grow in the desert area and adapted to live in a dry habitat. Xanthophytes are yellow-green algae.
[#255] Calvin-Benson cycle present in,
Correct Answer
(D) All of the above
Explanation
Solution: Calvin - Benson cycle is a series of biochemical redox reactions that take place in the stroma of chloroplast in photosynthetic organisms. This cycle was discovered by Melvin Calvin, James Bassham, and Andrew Benson at the University of California in the year 1950. This cycle is present in C3 plants, C4 plants and also in CAM plants.