Question

Tunica Corpus theory is connected with
A) Root apex
B) Root cap
C) Shoot apex
D) Secondary growth

Answer 1

Hint: Only angiosperms exhibit Tunica Corpus theory. It is not seen in cryptograms and gymnosperms. The vegetative and floral part is described using this theory.

Complete Answer:
A) Root apex is connected with Histogen theory.
B) The plane in the shoot apex is well explained by Tunica Corpus theory. This theory is only to study shoot apex and not any parts of the root.The shoot is divided into two parts or zones. They are
 1.Tunica
2.Corpus
The layers L1, L2 are outer layer and inner layer of tunica
THe layer L3 is corpus.
The answer is clear as the theory is connected with shoot apex.
C) Shoot apex is Dome-shaped.Young leaves provide protection to shoot.
The theory was proposed by Schmidth in 1924.The new leaves and tissues of the stem occur at shoot apex.

The correct option is (c)Shoot apex.

Additional information: Tunica is the peripheral zone of shoot. The wall is divided in a perpendicular manner from the shoot surface. The tunica is not thick and it appears just like a sheet. A tunica with a single layer is called a unistratose tunica. A tunica with many layers is called a multi-stratose tunica. One to five layers of cells are seen in Dicots. One to four layers of cells in tunica is seen in monocots. Corpus is the interior layer.It is divided in a parallel manner.It makes up a single layer. Epidermis is formed by cells of tunica.

Note: Procambium and ground meristem are formed by cells of corpus. The tunica deals with the primary growth whereas the corpus deals with the innermost growth.