Study the given ray diagrams and select the correct statement from the following:

To perform an experiment to identify the different parts of an embryo of a dicot seed, first of all you require a dicot seed. Select dicot seeds from the following group:

Wheat, Gram, Maize, Pea, Barley, Ground-nut

The following vegetables are kept in a basket:

Potato, Tomato, Radish, Brinjal, Carrot, Bottle-gourd

Which two of these vegetables correctly represent the homologous structures?

A student obtains a blurred image of a distant object on a screen using a convex lens. To obtain a distinct image on the screen he should move the lens

A student very cautiously traces the path of a ray through a glass slab for different values of the angle of incidence (i). He then measures the corresponding values of the angle of refraction (r) and the angle of emergence (e) for every value of the angle of incidence. On analysing these measurements of angles, his conclusion would be