Tag: internal structure of dicot leaf

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Questions Related to internal structure of dicot leaf

Multiple choice botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of dicot leaf internal structure of leaf (dicot and monocot)

Dorsiventral leaf is identified by the presence of

  1. Stomata on both the epidermis

  2. Stomata mainly present on the lower epidermis

  3. No stomata on the epidermis

  4. Sunken stomata on the upper epidermis
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Stoma (plural stomata) is a pore, found in the epidermis of leaves, stems and other organs that is used to control gas exchange. Monocots have isobilateral leaf and dicots have dorsiventral leaf. Dicotyledons usually have more stomata on the lower epidermis than the upper epidermis. Monocotyledons, on the other hand, usually have the same number of stomata on the two epidermis. In plants with floating leaves, stomata may be found only on the upper epidermis and submerged leaves may lack stomata entirely.
Thus, the correct answer is option B.

Multiple choice botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of dicot leaf internal structure of leaf (dicot and monocot)

A dorsiventral leaf has

  1. Palisade tissue on both sides

  2. Spongy tissue on both sides

  3. Palisade tissue on upper side and spongy tissue on lower side

  4. Spongy tissue on upper side and palisade tissue on lower side
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In the dorsiventral leaf or dicot leaf, mesophyll is differentiated into palisade parenchyma and spongy parenchyma. Palisade parenchyma is present on the upper side and spongy parenchyma is present on the lower side.

So, the correct option is 'palisade tissue on the upper side and spongy tissue on the lower side'.

Multiple choice botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of dicot leaf internal structure of leaf (dicot and monocot)

Mesophyll is differentiated into palisade and spongy tissues in.

  1. Extremely xerophytic leaves

  2. Hydrophytic leaves

  3. Monocot leaves

  4. Dicot leaves
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The region present between the upper and lower epidermises is called mesophyll. In dicot leaves, mesophyll is differentiated into upper palisade parenchyma and lower spongy parenchyma. It is found in dicot leaves.

So, the correct answer is ‘Dicot leaves’

Multiple choice botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of dicot leaf internal structure of leaf (dicot and monocot)

In dorsiventral leaf, more number of stomata

  1. Occur on both the layers of epidermis

  2. Occur on lower epidermis

  3. Occur in pits on the upper epidermis

  4. Do not occur on the epidermis

  5. Bryophytes
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In dorsiventral leaf, more number of stomata occur on lower epidermis and less number of stomata present on upper epidermis.

So, the correct option is ‘occur on lower epidermis'.

Multiple choice botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of dicot leaf internal structure of leaf (dicot and monocot)

In a dorsiventral leaf, the location of xylem and phloem is

  1. Abaxial and adaxial respectively

  2. Adaxial and abaxial respectively

  3. Both are abaxial

  4. Both are adaxial
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

in dorsiventral or dicot leaf, midirib or main vein represents the vascular bundles. In this, xylem is present towards upper epidermis and phloem present towards the lower epidermis. These are collateral, conjoint, closed the position of protoxylem and metaxylem is not specified clearly.

So, the correct answer is 'Adaxial and abaxial respectively'.

Multiple choice botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of dicot leaf internal structure of leaf (dicot and monocot)

In dorsiventral leaves stomata occur

  1. More on upper palisade containing surface and less on spongy parenchyma containing lower surfac

  2. Fewer on upper surface and more on lower surface

  3. Equally on both

  4. None of the two surfaces
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In dorsiventral leaves, less stomata are present in the upper epidermis and more stomata are present on the lower epidermis.

So, the correct option is ‘Fewer on upper surface and more on lower surface’.

Multiple choice botany internal structure of root, stem and leaf internal structure of monocot leaf internal structure of dicot leaf internal structure of leaf (dicot and monocot)

Tetrarch bundles occur in

  1. Leaf of Cicer arietinum

  2. Leaf of Pisum sativum

  3. Root of Cicer arietinum

  4. Root of Zea mays
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Stele with four vascular bundles is called tetrarch stele. it is generally found in dicotyledons. In the vascular bundles xylem and phloem are on different raidii. So the vascular bundles are called radial vascular bundles. In the xylem protoxylem is faced towards the pericycle and metaxylem is faced towards the medulla.  eg:Cicer arietinum  roots. 

So, the correct option is 'Roots of Cicer arietinum.