Genetics And Plant Breeding - Study Mode

[#506] Cellulose is abscent in
Correct Answer

(B) Middle lamella

Explanation

Solution: Cellulose is absent in the Middle lamella. The middle lamella serves as a cementing layer between the primary walls of adjacent cells. The middle lamella is made up of calcium and magnesium pectate. There is no cellulose in the middle lamella layer. The primary wall is the cellulose-containing layer laid down by cells that are dividing and growing.

[#507] The spraying of leaves with silicon emulsion causes
Correct Answer

(B) Decrease transpiration

Explanation

Solution: The spraying of leaves with silicon emulsion causes decreased transpiration. Silicone emulsions are insoluble. Emulsions allow for products that can be used to moisturize, nourish and protect the skin and also can be used to deliver active ingredients or other components. Thus, it causes a decrease in the rate of transpiration.

[#508] The water from the soil enters into root hairs on account of
Correct Answer

(B) Suction pressure

Explanation

Solution: The water from the soil enters into root hairs on account of Suction pressure. Suction pressure is also called Diffusion Pressure Deficit. If some solute is dissolved in a solvent, its diffusion pressure decreases. It is DPD that tends to equate and represent the water-absorbing ability of a cell, it is also called suction force (SF) or suction pressure (SP). The actual pressure with which a cell absorbs water is called "suction pressure".

[#509] IPGRI headquarter is situated in
Correct Answer

(D) Rome, Italy

Explanation

Solution: IPGRI headquarter is situated in Rome, Italy. In October 1993, IBPGR became the International Plant Genetic Resources Institute (IPGRI) and in 1994 IPGRI began independent operation as one of the centers of the CGIAR. Its headquarters are in Rome's Maccarese borough, Italy. It is a global research-for-development organization that delivers scientific evidence, management practices, and policy options to use and safeguard agricultural biodiversity.

[#510] Turmeric is a modified stem
Correct Answer

(A) Rhizome

Explanation

Solution: Turmeric is a modified stem Rhizome. Turmeric is a perennial herbaceous plant that reaches up to 1 m (3 ft 3 in) tall. It has highly branched, yellow to orange, cylindrical, aromatic rhizomes. The leaves are alternate and arranged in two rows. They are divided into leaf sheath, petiole, and leaf blade. From the leaf sheaths, a false stem is formed. This false stem is also termed a modified stem.