Horticulture - Study Mode
[#386] Pollen grains are in . . . . . . . . stage at the time of pollination.
Correct Answer
(A) Binucleate
Explanation
Solution: Pollen grains are in the Binucleate stage at the time of pollination. Pollen of angiosperms may be either binucleate or trinucleate at maturity. The generative cell divides mitotically to give rise to the two male gametes before pollen grains are shed. A two-celled pollen grain consisting of a tube cell and a generative cell. The generative cell ultimately divides to yield two sperm cells well after pollination takes place.
[#387] Passion fruit is a
Correct Answer
(C) Day neutral plant
Explanation
Solution: Passion fruit is a Day neutral plant. Day-neutral plants do not depend upon the amount of darkness or daylight hours. It flowers regardless of the length of the period of light it is exposed to. The passion fruit is the fruit of several plants in the genus Passiflora. Passion fruits are round or oval, and range from a width of 1.5 to 3 inches. Several varieties of passionfruit are rich in polyphenols, and some contain prunasin and other cyanogenic glycosides in the peel and juice.
[#388] The richest source of iron is
Correct Answer
(B) Spinach
Explanation
Solution: The richest source of iron is spinach. A cup of cooked spinach contains about 6.5 mg of iron, which is a fair amount, considering that an average person needs about eight milligrams a day. Spinach provides many health benefits but very few calories. About 3.5 ounces (100 grams) of raw spinach contain 2.7 mg of iron or 15% of the DV. Although this is non-heme iron, which isn't absorbed very well, spinach is also rich in vitamin C.
[#389] Hill soils are deficient in
Correct Answer
(B) Nitrogen
Explanation
Solution: Hill soils are deficient in Nitrogen. Soils of the hills and mountains are defined to be those found in areas with altitudes above 300 m above sea level and slopes of 18% and above. They were developed from various rocks mostly shale and sandstone, basalt and andesite, and limestone. Major land uses in these soils include forests, grasses and shrubs. Hill soils are generally termed as acidic with high organic matter and are prone to erosion.
[#390] Optimum seed rate for marigold is (kg/ha)
Correct Answer
(A) 1.5
Explanation
Solution: The optimum seed rate for marigolds is 1.5 (kg/ha). Seed rate is the quantity of seed of a crop that is required to sow a unit area of land for optimum crop production. Marigolds germinate quickly, sprouting within a few days and blooming in about 8 weeks, making them easy to grow from seed.