Question

Mesophyll tissue is well differentiated into spongy tissue and palisade tissue in
A. Dicot leaves
B. Xerophytic stem
C. Hydrophytic stem
D. Monocot stem

Answer 1

Hint: The internal cell membrane situated seen between leaf's two epidermal cell layers is mesophyll. Two kinds of tissues are composed of the palisade parenchyma, an upper layer of elongated chlorenchyma cells containing large amounts of chloroplasts. It also has spongy parenchyma, a lower layer with few chloroplasts and spherical or ovoid cells with very visible intercellular air spaces.

Complete answer:
Monocot stems cover an additional layer of dermal tissue called the epidermis. The remainder of the stem is created by ground tissue and vascular tissue. Xerophytes such as cacti are capable over extended periods of withstanding dry conditions. Waxy and thorny, the leaves resist moisture and water loss. Hydrophytes are plants which live totally or partially submerged in fresh water.
The tissue present in the plant's leaves is considered mesophyll tissue. Dicot plant leaves contain two types of mesophyll tissue. Parenchyma cells, known as palisade parenchyma, are tall and pillar-like. These cells are assembled efficiently near the upper epidermis. There are loosely-organized spongy parenchyma cells near the lower epidermis. The bundle sheath is normally single-layered and colourless cells are produced. Extensions of bundle sheaths are parenchymatous.

Hence, the correct answer is option (A).

Note: Right under the upper epidermis of the leaf, Palisade mesophyll cells are found. They contain the greatest number of chloroplasts of any plant cell, so they are designed for photosynthesis. The Spongy Mesophyll is located below the palisade mesophyll. The spongy mesophyll's loosely-packed nature helps gases to pass through the leaf tissue more readily.