Home
Class 12
BIOLOGY
In Selaginella stem, trabeculae represen...

In Selaginella stem, trabeculae represent modified
(a) Phloem cells
(b) Endodermal cells
(c) Pericycle cells
(d) Cortical cells

A

Phloem cells

B

Endodermal cells

C

Pericycle cells

D

Cortical cells.

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the modified cells represented by trabeculae in the Selaginella stem, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Structure of Selaginella**: - Selaginella is a type of vascular plant that has a unique stem structure. It is important to familiarize ourselves with its anatomy to identify the role of trabeculae. 2. **Define Trabeculae**: - Trabeculae are specialized structures found within the stem of Selaginella. They are known for their elongated shape and presence of air spaces. 3. **Identify the Type of Cells**: - The question asks which type of modified cells trabeculae represent. The options provided are phloem cells, endodermal cells, pericycle cells, and cortical cells. 4. **Analyze Each Option**: - (a) **Phloem cells**: These are involved in the transport of nutrients, primarily sugars. Trabeculae do not function in this capacity. - (b) **Endodermal cells**: These cells form the innermost layer of the cortex and regulate the flow of water and nutrients into the vascular system. Trabeculae in Selaginella are indeed modified endodermal cells. - (c) **Pericycle cells**: These are located just inside the endodermis and are involved in the formation of lateral roots. Trabeculae are not derived from pericycle cells. - (d) **Cortical cells**: These cells make up the cortex, which is outside the endodermis. Trabeculae are not modifications of cortical cells. 5. **Conclusion**: - Based on the analysis, trabeculae in Selaginella stem represent modified **endodermal cells**. Therefore, the correct answer is **(b) Endodermal cells**. ### Final Answer: (b) Endodermal cells
Promotional Banner

Topper's Solved these Questions

  • KINGDOM PLANTAE OR METAPHYTA

    DINESH PUBLICATION ENGLISH|Exercise CYG|20 Videos

  • KINGDOM MONERA (THE PROKARYOTES)

    DINESH PUBLICATION ENGLISH|Exercise CHECK YOUR GRASP|20 Videos

  • KINGDOM PROTISTA (UNICELLULAR EUKARYOTES)

    DINESH PUBLICATION ENGLISH|Exercise CHECK YOUR GRASP|19 Videos

Similar Questions

Explore conceptually related problems

In anther, meiosis occur in (a) Tapetal cells (b) Endothecial cells (c) Pollen mother cells (d) Stomium cells

Stem cells are

Androgenic haploidy makes use of cells (a) Anther cells (b) Callus cells (c) Megaspore cells (d) Microspore cells

Origin of lateral root of secondary root is 1 Endodermal cells against phloem 2 Pericycle cells against protoxylem 3 Cortical cells below root hairs 4 Epiblema/phellogen

Accretionary growth is due to (a) Reserve cells (b) Meristematic cells (c) Embryonic cells (d) Differentiated cells

Cell theory was first modified by

Blood brain barrier is formed by (a) Astrocytes (b) Oligodendrocytes (c) Glial cells (d) Microglial cells

Hypodermis of dicot stem is made up of (a) Parenchymatous cells (b) Collenchymatous cells (c) Sclerenchymatous cells (d) Prosenchymatous cells

Pepsinogen is secreted by (a) chief cell (b) oxyntic cell (c) mast cell (d) parietal cell

Arrange root hair cell, inner cortical cell and mesophyll cell in ascending order of DPD. (a) Mesophyll cell, Root hair cell and Cortical cell (b) Cortical cell, Mesopphyll cell and Root hair (c) Root hair cell , Cortical cell and Mesophyll cell (d) Root hair cell, Mesophyll cell and Cortical cell