Horticulture - Study Mode
[#756] Protogynous diuranally synchronous dichogamy is observed in
Correct Answer
(B) Avocado
Explanation
Solution: Protogynous diuranally synchronous dichogamy is observed in Avocado . The avocado flower has a unique flowering behaviour, in addition, the avocado flower has a very interesting bisexual quality in which the flower opens twice. First opening in the female stage, then closing and opening the next day in the male stage. This phenomenon is called protogynous, diurnally synchronous dichogamy. The dichogamy is protogynous, as the pistil matures before the stamens in both types and all flowers of type A are synchronous to be functionally female at one time of the day and functionally male at anther time. The combination of protogynous dichogamy and the flowering behaviour of the avocado prevents self-pollination promoting outcrossing.
[#757] Pre-canning treatment of fruits and vegetables with boiling water for a short time is called
Correct Answer
(A) Blanching
Explanation
Solution: Pre-canning treatment of fruits and vegetables with boiling water for a short time is called Blanching . Blanching is a cooking process in which a food, usually a vegetable or fruit, is scalded in boiling water, removed after a brief, timed interval and finally plunged into iced water or placed under cold running water (known as shocking or refreshing) to halt the cooking process. It increases the shelf life of the fruits and vegetables.
[#758] The native place of cabbage is
Correct Answer
(C) Western Europe
Explanation
Solution: Cabbage is generally grown for its densely leaved heads, produced during the first year of its biennial cycle. Plants perform best when grown in well-drained soil in a location that receives full sun. The native place of cabbage is Western Europe . Cabbages and kale were probably the first to be domesticated, before 1000 BC, perhaps by the Celts of central and Western Europe although recent linguistic and genetic evidence enforces a Mediterranean origin of cultivated brassicas.
[#759] Extent of natural cross-pollination and the desired isolation distance are given. Find out the wrong one.
Correct Answer
(D) None of the above
Explanation
Solution: Isolation distance is the minimum separation required between two or more varieties of the same species for the purpose of keeping seed pure. As a general rule, plants that primarily self-pollinate require less isolation distance, while plants that primarily cross-pollinate require greater distances. Therefore None of the above options given is wrong as per the rule, that is the extent of natural cross-pollination is decreasing with decrease in distance. When isolation distance is more that is 500 - 1000 meter, the extent of natural cross-pollination is maximum i.e. 50 - 75%.
[#760] Exhausting temperature of canned fruits and vegetables is
Correct Answer
(B) 80° - 82°C
Explanation
Solution: Exhausting temperature of canned fruits and vegetables is 80 - 82°C . Exhausting is the process of removal of air from the cans. It is very essential as it avoids the corrosion of tinplate and pinholing during the storage. Exhausting is done to minimize discoloration, to reduce chemical reaction between the container and the contents. The fruit cans are exhausted at 80 - 82°C for 7 - 10 minutes or until temperature at the centre of the can reaches 74°C.