Tag: internal structure of dicot leaf

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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 typical leaf palisade parenchyma is present

  1. On the abaxial side

  2. On the adaxial side

  3. In the middle of the leaf

  4. In the petiole of the leaf
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Palisade parenchyma cells are plant cells found within the mesophyll in leaves, right below the upper epidermis and cuticle. They are vertically elongated, a different shape from spongy mesophyll cells beneath them in the leaf. Their chloroplasts absorb a major portion of the light energy used by the leaf. 

Palisade cells occur in dicotyledonous plants and also in the net-veined monocots. Pallisade cells are present on the adaxial side that is the upper side of 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)

The types of parenchyma cells present in dicot leaf are

  1. Palisade

  2. Spongy

  3. Both A and B

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Palisade cells are plant cells found within the mesophyll in leaves, right below the upper epidermis and cuticle. They are vertically elongated, a different shape from spongy mesophyll cells beneath them in the leaf. Their chloroplasts absorb a major portion of the light energy used by the leaf. Palisade cells occur in dicotyledonous plants and also in the net-veined monocots. The spongy mesophyll are usually ball-shaped with large intercellular spaces but usually contains fewer chloroplasts than the palisade cells. They are also present in 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)

In floating leaved plants stomata occur on

  1. Lower surface

  2. Upper surface

  3. Both surfaces

  4. Absent
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Stomata is a pore, found in the epidermis of leaves, used to control gas exchange. The pore is bordered by a pair of specialized parenchyma cells, known as guard cells that are responsible for regulating the size of the opening. Stomata are present in the sporophyte generation of all land plant groups except liverworts. 

Dicotyledons usually have more stomata on the lower epidermis than the upper epidermis. 
In plants with floating leaves, stomata may be found only on the upper epidermis and submerged leaves may lack stomata entirely.

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)

The differentiation of Palisade tissue and spongy parenchyma is found in ______________.

  1. Isobilateral

  2. Dorsiventral leaves

  3. Both

  4. None
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Dorsiventral leaf i.e. Mesophyll is the ground tissue and it occurs between the two epidermal layers. It is heavily composed of chlorenchyma cells. The mesophyll is differentiated into two regions an upper palisade parenchyma and lower spongy parenchyma. Palisade parenchyma is again composed of two or three layers of elongated and compactly arranged chlorenchyma cells.

Also, the isobilateral leaf has undifferentiated mesophyll.

Therefore, 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)

In dorsiventral leaves

  1. Upper surface is dark green as compared to lower surface

  2. Both the surfaces are equally green

  3. Lower surface is dark green

  4. Both the surfaces are dark green
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Leaves, in which both surfaces are differentiated are called dorsiventral leaves. In these leaves, palisade parenchyma is present towards the upper epidermis and spongy parenchyma is present towards the lower epidermis. Because of this reason, in dorsiventral leaves, the upper side is dark green in colour and lower side is light green in colour.

So, the correct answer is ‘Upper surface is dark green as compared to the 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)

Spongy parenchyma is arranged in

  1. One layer

  2. Loosely arranged

  3. Compactly arranged

  4. Regularly arranged around large cavities
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The parenchyma with loosely arranged cells, present in the mesophyll of leaves is called spongy parenchyma.

So, the correct option is ‘Loosely arranged’

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)

Palisade parenchyma is present on both sides in.

  1. Nerium

  2. Eucalyptus

  3. Wheat

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In xerophytic leaves, mesophyll is differentiated into palisade and spongy parenchyma. In these leaves, palisade parenchyma is present on both sides. i.e towards upper epidermis and lower epidermis. In the palisade parenchyma cells are cylindrical in shape contains more number of chloroplasts. In spongy parenchyma, cells are oval in shape, loosely arranged, with less number of chloroplasts. 

eg:Nerium, Eucalyptus.
So, the correct option is 'Both A and 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)

Mesophyll is differentiated into palisade and spongy tissue in

  1. Some monocot leaves

  2. All dorsiventral leaves

  3. All monocot leaves

  4. All isobilateral leaves
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The region present between the upper and lower epidermis of leaves is called mesophyll. It is differentiated into upper palisade and lower spongy parenchyma in dicot leaves or dorsiventral leaves, whereas in monocot leaves or isobilateral leaves, it is undifferentiated and it shows spongy parenchyma.

So, the correct option is ‘All dorsiventral 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)

Match the columns and choose the correct option.

I II
(a) Bulliform cells $(1)$ Initiation of lateral roots
(b) Pericycle $(2)$ Root
(c) Endarch xylem $(3)$ Grasses
(d) Exarch Xylem $(4)$ Dicot leaf
(e) Bundle sheath cells $(5)$ Stem
  1. $a-3, b-5, c-4, d-1, e-2$
  2. $a-2, b-5, c-1, d-3, e-4$
  3. $a-2, b-4, c-1, d-3, e-5$
  4. $a-3, b-1, c-5, d-2, e-4$
  5. $a-5, b-4, c-2, d-1, e-3$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

a-bulliform cells                3) Grasses

b)Pericycle                         1) Initiation of lateral roots

c)Endarch xylem                5)stem

d)Exarch xylem                  2)Root

e)Bundle sheath cells       3)Grasses

So, the correct option is ‘a-3, b-1, c-5, d-2, e-4

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)

Match List I with List II and select the correct answer.

List-I List-II
a. Sal $1$. Pinus roxburghii
b. Shisham $2$. Tectona grandis
c. Chir $3$. Dalbergia sisso
d. Teak $4$. Shorea robusta
  1. A-$4$, B-$3$, C-$1$, D-$2$
  2. A-$4$, B-$3$, C-$2$, D-$1$
  3. A-$3$, B-$4$, C-$1$, D-$2$
  4. A-$3$, B-$4$, C-$2$, D-$1$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The correct botanical matches are: Sal (Shorea robusta), Shisham (Dalbergia sisso), Chir (Pinus roxburghii), and Teak (Tectona grandis). This corresponds to A-4, B-3, C-1, D-2.