Question

2. Write characters of T.S. of Selaginella stem.
सिलेजिनेला तने की अनुप्रस्थ काट के लक्षणों को लिखिए |​

Answer 1

Answer:

sarystdyariixtdivfcbbgdrgucre cix fjxevj

Explanation:

guhichgujifyvjctfufygcyctdyhcycygudtvcghxffhcyfucfxuvydy

Answer 2

Answer:

The stem of Selaginella has a slightly round form in a transverse section (T.S.).

Explanation:

A transverse section (T.S.) of Selaginella's stem has a fairly round form and reveals the following structures:

1. Epidermis: The epidermis is the outermost covering layer, which is made up of a single cell. Hairs and stomata are absent from epidermal cells. A thick layer of cuticle surrounds the epidermis on all sides.
2. Cortex: A well-defined zone of cortex exists within the epidermis. The inner and outer cortex may or may not be distinguished in the cortex. In the case of S. selaginoides, the entire cortex is comprised of cells of the parenchyma it is split into S. kraussiana. The outer cortex is sclerenchymatous, whereas the interior cortex is parenchymatous.
3. Stele: A well-developed stele occupies the centerpiece of the stem. The stele is protostelic, meaning that the xylem is present in the center and the phloem surrounds it on all sides. The pericycle, in turn, is encircled by single-layered phloem. Pith isn't present. Trabeculae radially extended tubular, unicellular structures, keep the stele hanging in the center. The endodermal cells' radial elongation causes them to develop. Casparian strips are prominently seen on trabeculae. Large spaces known as air voids exist between the trabeculae.