Genetics And Plant Breeding - Study Mode

[#796] Resistance exhibited by adult plants is referred to as
Correct Answer

(C) adult resistance

Explanation

Solution: Resistance exhibited by adult plants is referred to as adult resistance. Adult plant resistance (APR) is a phenomenon in which disease-resistance genes can confer resistance at the adult stages of the plant but somehow fail to do so at the seedling stages. Despite the widespread occurrence of APR in various plant diseases, the mechanism underlying this trait remains obscure.

[#797] Designated inseparable seeds for wheat is
Correct Answer

(D) All of the above

Explanation

Solution: Designated inseparable seeds for wheat are Oat, Gram and Barley. These are the plants of cultivated crops found in the seed field and whose seeds are so similar to crop seeds that are difficult to separate them economically by mechanical means. Thus, oat, gram, and barley seed plants cannot be separated by mechanical means.

[#798] DNA can be formed by
Correct Answer

(D) RNA dependent DNA pol.

Explanation

Solution: DNA can be formed by RNA-dependent DNA pol. Reverse transcriptase (RT), also known as RNA-dependent DNA polymerase, is a DNA polymerase enzyme that transcribes single-stranded RNA into DNA. This enzyme can synthesize a double helix DNA once the RNA has been reverse-transcribed in the first step into a single-strand DNA.

[#799] Leafy vegetables like palak, amaranth us, spinach, are
Correct Answer

(A) Highly cross pollinated

Explanation

Solution: Leafy vegetables like palak, amaranthus, and spinach, are Highly cross-pollinated. Cross-pollination is found in both angiosperms and gymnosperms and facilitates cross-fertilization and outbreeding. Cross-pollination is the process of applying pollen from one flower to the pistils of another flower. Pollination occurs in nature with the help of insects and wind. This process can also be done by hand to produce offspring with desired traits, such as colour or pest resistance.

[#800] In wheat, an interspecific cross between Triticum aestivum and T. durum is
Correct Answer

(D) Partially fertile

Explanation

Solution: In wheat, an interspecific cross between Triticum aestivum and T. durum is partially fertile. Interspecific hybridization is the crossing of two species from the same genus. This allows the exploitation of useful genes from wild, unimproved species for the benefit of the cultivated species. The wheat variety obtained by a cross between T. aestivum and T. durum is partially fertile.