Structural Orga...

Lateral meristems are cylindrical meristems and they occur in the mature regions of root and shoot of many plants. Which of the following are examples of lateral meristems?

a. Cork-cambium
b. Intercalary meristem
c. Fascicular vascular cambium
d. Apical meristem

Which of the following tissues is/are produced by the apical meristem during the formation of the primary plant body?

a. Dermal tissue
b. Ground tissue
c. Connective tissue
d. Vascular tissue

Which of the following provide(s) mechanical strength to young dicot stems, petioles and leaves?

a. Parenchyma
b. Collenchyma
c. Sclerenchyma

Sclereids are of many types. Which of the following sclereids are unbranched, short and isodiametric with ramiform pits?

Which of the following is not a characteristic of permanent tissues?

Xylem is a complex tissue and consists of four types of cells. Which of the following are not a type of xylem cell?

Depending upon the position of protoxylem in relation to metaxylem, xylem can be of four types. In which of the following types of xylem does protoxylem lie towards the outside of metaxylem?

Trichomes are of two types, hairs and scales. Which of the following hairs are unicellular or multicellular appendages which are covered by a layer of cuticle?

In root and dicot stems, the ground tissue system is differentiated into hypodermis, cortex, endodermis, pith and medullary rays. Which of the following acts as a check post between vascular strand and cortex?

Read the following statements and answer accordingly:

a. Epidermis is the outermost layer of the stem which is made up of compactly arranged transparent, elongated and rectangular barrel-shaped living parenchyma cells.
b. The outer walls of epidermal cells possess deposition of silica and cutin.

Which of the following is a characteristic of monocot stem?

Read the following statements and answer accordingly:

a. Ray initials produce axial system while fusiform initials form radial system of secondary vascular tissues.
b. Fusiform initials divide to form secondary phloem on the outer side and secondary xylem on the inner side.

Which of the following are rows of radially arranged cells which are formed in the secondary vascular tissues and conduct water and organic food?

Several of the softwoods like those of Cedrus, Pinus species are very easy to work with. Which of the following statements is correct about softwood?

Anatomically, there can be three types of leaves. In which of the following types of leaves, a distinction into upper and lower surfaces is absent?

a. Dorsiventral
b. Isobilateral
c. Unifacial