Which one is an improved variety of wheat?

Explain variants or mutation as a method of disease resistance.

Triticale was obtained by crossing wheat with which of the following?

The host crop plants may be resistant to insect pests due to the
$I$. Morphological characteristics
$II$. Biochemical characteristics
$III$. Physiological characteristics
Choose the correct option.

Which crop developed by mutation breeding shows resistance to yellow mosaic virus?

Fill in the blanks in the following statements ($A$ to $C$):
$(A)$ The capacity to generate a whole plant from any cell/explant is called ......$(i)$ .......
$(B)$ The transfer of resistance genes occurs through ........$(ii)$ ........ . Subsequently,......$(iii)$ ....... occurs between the target and the source plant.
$(C)$ The rice variety $IR8$ was developed in the country ........$(iv)$ .