Question

Given below is diagrammatic view of a typical dicot embryo. Identify the parts labelled A, B, C and D and select the right option amongst them.

• A. $\begin{array}{ccccc}& \text{Part-A}& \text{Part-B}& \text{Part-C}& \text{Part-D}\\ & \text{Radicle}& \text{Plumule}& \text{Cotyledons}& \text{Root Cap}\end{array}$
• B. $\begin{array}{ccccc}& \text{Part-A}& \text{Part-B}& \text{Part-C}& \text{Part-D}\\ & \text{Plumule}& \text{Cotyledons}& \text{Root Cap}& \text{Radicle}\end{array}$
• C. $\begin{array}{ccccc}& \text{Part-A}& \text{Part-B}& \text{Part-C}& \text{Part-D}\\ & \text{Plumule}& \text{Cotyledons}& \text{Radicle}& \text{Root Cap}\end{array}$
• D. $\begin{array}{ccccc}& \text{Part-A}& \text{Part-B}& \text{Part-C}& \text{Part-D}\\ & \text{Radicle}& \text{Cotyledons}& \text{Plumule}& \text{Root Cap}\end{array}$

Answer 1

The correct option is C $\begin{array}{ccccc}& \text{Part-A}& \text{Part-B}& \text{Part-C}& \text{Part-D}\\ & \text{Plumule}& \text{Cotyledons}& \text{Radicle}& \text{Root Cap}\end{array}$


Part A is plumule. The portion of embryonal axis above the cotyledons is the epicotyl which terminates with the plumule or stem tip.

Part B is cotyledon. It is the seed leaf within the embryo of a seed. It helps supply the nutrition when a plant needs to germinate.

Part C is radicle. The cylindrical portion below the level of cotyledons is the hypocotyl that terminates at its lower end in the radicle or root tip.

Part D is root cap. It is present at the tip of root. It is also called calyptra. It has the function of protecting the delicate cells within the root tip.