Arrange the following in the order of their location from periphery to centre in the entire dicotyledonous plant body
(a) Fusiform cells
(b) Trichoblasts
(c) collocytes
(d) Tyloses
The correct sequence is

Options

A. b, c, a, d
B. a, b, c, d
C. d, a, b, c
D. c, b, a, d

Answer

To arrange the given cells in the order of their location from the periphery to the center in the dicotyledonous plant body, we need to understand where each type of cell is typically found:

1. **Trichoblasts (B)**: These are specialized cells located on the exterior surface of the plant's roots. They are responsible for forming root hairs, which increase the surface area for nutrient uptake. Since they are on the outermost layer, they are the first in our sequence.

2. **Colocytes (C)**: These cells are found in the collenchyma, which provides mechanical support to the plant. They are located in the hypodermis of the cortex, which is beneath the epidermis but still relatively close to the surface. Therefore, they come next in our sequence.

3. **Fusiform cells (A)**: Also known as fusiform initials, these cells are located in the vascular cambium. They are responsible for the formation of secondary xylem and phloem during secondary growth. Since they are deeper within the plant structure, they follow colocytes in our arrangement.

4. **Tyloses (D)**: These are balloon-like structures that form in the heartwood of the plant. They bulge through the circular bordered rings of vessels and block water movement. Being located at the center of the plant, they come last in our sequence.

Now, we can summarize the order from periphery to center:

**Correct Sequence**: Trichoblasts (B) → Colocytes (C) → Fusiform cells (A) → Tyloses (D)

Thus, the final answer is: **B, C, A, D**.