Question

In apple type of stomata

• A. Stomata are present only on the upper surface of leaf
• B. Stomata are present only on the lower surface of leaf
• C. Stomata are present on both surface of leaf
• D. Stomata are vestigial

Answer 1

The correct option is B Stomata are present only on the lower surface of leaf

Types of Stomata based on Distribution

Apple or mulberry type: Stomata are found distributed only on the lower surface of the leaves. eg., apple, peach, mulberry, walnut etc. Such leaves are called as hypostomatic type.

Water lily type: Stomata are distributed only on the upper epidermis of the leaves. eg., water lily, Nymphaea and many aquatic plants. These plants are epistomatic type.

Potato type: In this type, the stomata are found more on the lower surface (multistomatic) and less on the upper leaf surface (paucistomatic type). eg., Potato, cabbage, bean, tomata, pea etc. Such leaves are called as amphistomatic and anisostomatic type.

Oat type: Stomata are equally distributed on the both lower and upper surface of the leaves. These leaves are referred as isostomatic type.

Potamogeton type: In this case, stomata are altogether absent or if present, they are vestigial. eg., Potamogeton and other submerged aquatics. Such leaves are called as astomatic type.