Spongy Parenchyma

Q.

Define simple tissues.

Q.

Do aquatic plants have stomata?

Q. Identify the type of vascular bundle in the figures (i) and (ii) and select the correct option.

1. (i) Conjoint collateral
   (ii) Conjoint bicollateral
2. (i) Conjoint bicollateral
   (ii) Conjoint collateral
3. (i) Conjoint collateral closed
   (ii) Conjoint collateral open
4. (i) Conjoint collateral open
   (ii) Conjoint collateral closed

Q.

When we observe the lower surface of a leaf through a magnifying lens we see numerous small openings. Which of the following is the term given to such openings?

1. Stomata

2. Lamina

3. Midrib

4. Veins

Q.

What is the function of gelatinous sheath?

Q. Choose the option which shows the correct labelling of the parts marked as A, B, C, D and E in the given figure.

1. A - Tracheids, B - Phloem, C - Mesophyll, D - Stomatal pore, E - Guard cell
2. A - Phloem, B - Xylem, C - Palisade, D - Guard Cell, E - Water pore
3. A - Xylem, B - Phloem, C - Palisade, D - Guard cell, E - Stomatal pore
4. A - Phloem, B - Xylem, C - Mesophyll cell, D - guard cell, E - Water pore

Q.

Where does collenchyma occur?

Q.

Name any one component of the complex tissue which is absent in Monocotyledons.

Q.

Fill in the blanks by choosing suitable words from the brackets:

b. The __________ surface of a dicot leaf contains more stomata. (upper/lower)

Q. The tissue that is absent in cortex of Dicot stem is

1. Parenchyma
2. Collenchyma and sclerenchyma
3. Collenchyma
4. Sclerenchyma

Q. ________is the example of dicot plant.

1. Mango
2. Banana
3. Onion
4. Wheat

Q. Which of the following in spite of being dicot lacks cotyledons?

1. Cuscuta
2. Pistia
3. Dianthus
4. Ranunculus

Q. Assertion :In dicot leaf, epidermis covers both the upper surface (adaxial epidermis) and lower surface (abaxial epidermis) Reason: The adaxial epidermis bears more stomata than the abaxial epidermis

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Mesophyll is differentiated in spongy and palisade tissue is

1. Isobilateral leaf
2. Dorsiventral leaf
3. Both of (A) and (B)
4. None of the above

Q. What is plant tissue culture

Q. Match the columns and choose the correct option.

	I		II
(a)	Bulliform cells	$\left(1\right)$	Initiation of lateral roots
(b)	Pericycle	$\left(2\right)$	Root
(c)	Endarch xylem	$\left(3\right)$	Grasses
(d)	Exarch Xylem	$\left(4\right)$	Dicot leaf
(e)	Bundle sheath cells	$\left(5\right)$	Stem

1. $a-2,b-4,c-1,d-3,e-5$
2. $a-3,b-5,c-4,d-1,e-2$
3. $a-3,b-1,c-5,d-2,e-4$
4. $a-2,b-5,c-1,d-3,e-4$
5. $a-5,b-4,c-2,d-1,e-3$

Q. Palisade parenchyma and spongy parenchyma are the two components of

1. Cortex of a dicot stem
2. Cortex of monocot root
3. Cortex of hydrophytic stem
4. Mesophyll of the leaf

Q.

Question 3

The lower surface of leaf will have more number of stomata in a

(a) dorsiventral leaf (b) isobilateral leaf

(c) Both (a) and (b) (d) None of these

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

1. Isobilateral
2. Dorsiventral leaves
3. Both
4. None

Q.

Fill in the blanks by using suitable words.​

(ii) There are …….kinds of supportive tissue in plants.

Q.

Differentiate between parenchyma cells and collenchyma cells.

Q. Why a large number of stomata are present at the lower surface of the dicotyledonous leaves in the terrestrial plants?

Q. Describe the internal structure of dicot leaf with the help of diagram.

Q.

What is parenchyma?

Q. Mesophyll is differentiated into palisade and spongy tissue in

1. Some monocot leaves
2. All dorsiventral leaves
3. All isobilateral leaves
4. All monocot leaves

Q. In dorsiventral leaf, more number of stomata

1. Occur on both the layers of epidermis
2. Occur on lower epidermis
3. Bryophytes
4. Occur in pits on the upper epidermis
5. Do not occur on the epidermis

Q. The lower surface of leaf will have more number of stomata in a __________.

1. Dorsiventral leaf
2. None of these
3. Both (a) and (b)
4. Isobilateral leaf

Q. Timerous Flowers are common among.

1. Dicots
2. Xerophytes
3. Monocots
4. Gymnosperms

Q. The upper surface of a leaf is dark green in colour when compared to the lower surface of the leaf. The presence of which tissue near the upper epidermis is responsible for this?

1. Palisade
2. Spongy
3. Collenchyma
4. Vessels

Q. In stem, the proto-xylem lies towards the _____________ and the meta-xylem lies towards the ____________

1. center; periphery
2. ventral ; dorsal
3. periphery; center
4. dorsal ; ventral