Question

A Dorsiventral leaf has
a. Palisade tissue on both sides
b. Spongy tissue on both sides
c. Palisade tissue on upper side and spongy tissue on lower
d. Spongy tissue on upper side and palisade tissue on lower

Answer 1

Hint: Inside the leaf is separated into the upper and lower epidermis and mesophyll, which lies in the middle of the two epidermises. The appropriation of stomata is normally limited to bring down the epidermis. Dorsiventral leaves arrange themselves at an edge to the primary pivot and opposite to the bearing of daylight.

Complete answer:
In the dorsiventral leaf, it is separated into palisade parenchyma and springy parenchyma. Palisade parenchyma lies towards the upper epidermis and comprises one, a few layers of prolonged cells, thickly pressed with no intercellular spaces and contains chloroplast. In this way, the right choice is 'palisade parenchyma on the upper side and spongy on the lower side. So, option C is correct.

Leaves are found in dicots. The vertical segment of a dorsiventral leaf contains three unmistakable parts:
- Epidermis: The epidermis is available on both the upper surface mesophyllermis) and the lower surface (abaxial epidermis). The epidermis outwardly is secured with a thick fingernail skin. The abaxial epidermis bears more stomata than the adaxial epidermis. So, options A and D are incorrect.
- Mesophyll: The mesophyll is a tissue of the leaf present between the adaxial and abaxial epidermises. It is separated into the palisade parenchyma (made out of tall, minimally positioned cells) and the elastic parenchyma (including oval or round, inexactly orchestrated cells with intercellular spaces). So, option B is incorrect.
- Vascular framework: The vascular packs present in leaves are conjoint and shut. They are encircled by thick layers of pack sheath cells.

Hence, the correct answer is option (C)

Note: The mesophyll is created of palisade and springy parenchyma. The palisade cells are lengthened and arranged in the cross over the plane towards the epidermis. The springy parenchyma cells are pretty much isodiametric fit as a fiddle and happen in the middle of the palisade and lower epidermis with bountiful intercellular spaces. The vascular groups, in the cross over part of a leaf, are of various sizes and not organized in a cross over the line. Ex. dicotyledonous leaf.