Question

graphically life cycle of funaria​

Answer 1

(i) Juvenile stage represented by primary protonema and

(ii) The leafy gametophore which represents the adult form.

• The adult gametophyte (gametophore) is differentiated into rhizoids, axis or ‘stem’ and ‘leaves’. Rhizoids arise from the base of the axis. They are slender, branched, and multicellular and have oblique septa.

Axis is 1—3 cm. high, upright, slender and branched. Each branch is extra axillary i.e., arise below a leaf. Leaves are sessile, oblong-ovate with entire margin, pointed apex and are arranged spirally on the branches and ‘stem’. Each ‘leaf’ is traversed by a single mid rib . ‘Leaves’ are borne in 1/3 phyllotaxy which becomes 3/8 at maturity.

Funaria

(ii) Internal Structure:

1. Axis or ‘stem’

The transverse section (T. S.) of axis can be differentiated into three distinct regions:

(i) Epidermis

(ii) Cortex

(iii) Central conducting strand or central cylinder.

(i) Epidermis:

It is the outer most single layered protective covering consisting of small tangentially elongated chlorophyll bearing cells. Cuticle and stomata are absent.

Answer 2

hey you here is your answer

(i) Juvenile stage represented by primary protonema and

(ii) The leafy gametophore which represents the adult form.

The adult gametophyte (gametophore) is differentiated into rhizoids, axis or ‘stem’ and ‘leaves’ (Fig. 1 A). Rhizoids arise from the base of the axis. They are slender, branched, and multicellular and have oblique septa.

Axis is 1—3 cm. high, upright, slender and branched. Each branch is extra axillary i.e., arise below a leaf. Leaves are sessile, oblong-ovate with entire margin, pointed apex and are arranged spirally on the branches and ‘stem’. Each ‘leaf’ is traversed by a single mid rib (Fig. 1B). ‘Leaves’ are borne in 1/3 phyllotaxy which becomes 3/8 at maturity.

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