HORTICULTURE

HORTICULTURE SCIENCE

ULTRA STRUCTURE OF PLANT CELLS AND ORGANS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of these is a structural adaptation of the upper epidermis?
A
Long, vertically arranged cells
B
Transparent, no chloroplasts
C
Tightly packed
D
Rounded shape
Explanation: 

Detailed explanation-1: -Upper epidermis This is a single layer of cells containing few or no chloroplasts. The cells are quite transparent and permit most of the light that strikes them to pass through to the underlying cells. The upper surface is covered with a waxy, waterproof cuticle, which serves to reduce water loss from the leaf.

Detailed explanation-2: -The upper epidermis contains fewer chloroplasts since it contains fewer guard cells. The thinness of the leaf allows the sunlight to penetrate right through it, and reach all the cells. To help this, the epidermal cells are transparent, with no chloroplasts.

Detailed explanation-3: -Upper Epidermis: A protective layer of cells that produces the cuticle. The epidermis is also transparent and very thin to allow maximum light penetration (let the light come through).

There is 1 question to complete.