Question

Question #d2aa0

Answer 1

See below.

Explanation:

A typical leaf contains epidermis made of cuticle, mesophyll cells[parenchymatous tissue with chloroplast perform photosynthesis}, stomatal apparatus{guard cell and subsidiary cell}, bundle sheath with vascular tissue{xylem,phloem}, bulliform cells in monocots etc.

The leaf cross section of monocot and dicot leaves are different.

DORSIVENTRAL{BIFACIAL} LEAF: IN DICOTS

• Present at right angle to the stem.
• the upper surface of the leaf receives more sunlight{so difference in internal structure- differentiation of mesophyll}
• seen in dicots
• the cuticle is seen on both surface [more thick in upper}

• stomata are present more on lower

• mesophyll cell is differentiated into upper palisade parenchyma [very closely packed without intercellular spaces
  cylindrical elingated/blue} and lower spongy parenchyma {spongy tissue-arranged loosely with intercellular spaces/shown circular and green}-

• Parenchymatous bundle sheath extensions.

ISOBILATERAL LEAF IN MONOCOTS

• Arranged parallel to stem

• Both surface of the leaf receive equal amount of sunlight [so no difference in internal structure of leaf}

• seen in monocots

• equal thickness of cuticle

• mesophyll cells not differentiated

• the upper epidermis has a few large colorless thin-walled cells called --BULLIFORM Cells [help in rolling and unrolling of leaf}

• sclerenchymatous bundle sheath extensions