131.

Which of these characters does/do not apply to the vascular bundle of monocot stem?

I. Conjoint

II. Endarch protoxylem

III. Open

IV. Phloem parenchyma is absent

• I and II only

• II and III only

• III and IV only

• III only

• III only

When one wood is lighter in colour with a lower density, the other wood is darker with higher density. They are

• Spring wood and autumn wood

• Heart wood and late wood

• Spring wood and early wood

• Sap wood and spring wood

• Sap wood and spring wood

Select the characters which are not applicable to the anatomy of dicot roots?

(A) Conjunctive tissue present

(B) Presence of protein compounds in the Casparian strips

(C) Polyarch xylem bundles

(D) Presence of pericycle

• (A) and (B)

• (B) and (D)

• (C) and (D)

• (A) and (D)

• (A) and (D)

Lenticels are involved in

• Photosynthesis

• Food transport

• Conduction of water

• Transpiration

• Transpiration

Match the following.

Column I	Column II
A.  Collenchyma	1.  Specialized epidermal cells
B. Subsidiary cells	2. Mechanical support for growing plants
C. Casparian strips	3. Mesophyll tissue of dicot leaf
D. Spongy parenchyma	4. Suberin deposition in the radial walls of endodermis

• A - 2; B - 1; C - 4; D - 3

• A - 2; B - 3; C - 4; D - 1

• A - 1; B - 2; C - 3; D - 4

• A - 4; B - 1; C - 2; D - 3

• A - 4; B - 1; C - 2; D - 3

Which of the following meristems are lateral meristems ?

• Apical meristem, interfacsicular cambium and cork cambium

• Fascicular vascular cambium, interfacsicular cambium and cork cambium

• Apical mertistem, intercalary meristem and cork cambium

• Intercalary meristem, interfacsicular cambium and cork cambium

• Intercalary meristem, interfacsicular cambium and cork cambium

Pick out the correct statement

• Spring wood is otherwise called late wood

• Autumn wood is otherwise called early wood

• In old trees, the heart wood is involved in the conduction of water

• In old trees, the sap wood does not conduct water

• In old trees, the sap wood does not conduct water

Which among these statements about collenchymas is true?

• Collenchyma cells are usually dead without protoplasts

• The cells are long and narrow with thick lignified walls

• Collenchyma occurs in layers below the epidermis in dicotyledonous plants

• These cells are found in the pulp of fruits like guava, pear and sapota

• These cells are found in the pulp of fruits like guava, pear and sapota

Which of the statements given below is not true about formation of Annual Rings in trees?

• Differential activity of cambium causes light and dark bands of tissue early and late wood respectively.

• Activity of cambium depends upon variation in climate.

• Annual rings are not prominent in trees of temperate region.

• Annual ring is a combination of spring wood and autumn wood produced in a year

Xylem translocates

• Water and mineral salts only

• Water, mineral salts and some organic nitrogen only

• Water, mineral salts, some organic nitrogen and hormones

• Water only