Question

If pericarp is fused with testa and the fruit contains a single seed. it is called as
A. Utricle
B. Achene
C. Caryopsis
D. Nut

Answer 1

Hint: It is considered as a type of simple dry fruit. It has a single carpel and the pericarp in it remains fused with the thin seed coat.

Complete answer: Caryopsis type of fruit is also referred to as a ‘grain’.
It is a specialized type of dry and typical one-seeded fruit. In this type of fruit, the ovary wall is united with the seed coat, making it difficult to separate the two except by special milling processes. With the exception of buckwheat, all other cereal grains have a caryopsis type of fruit.
Given below is the diagram of the caryopsis of wheat (Triticum aestivum):

Additional information: In terms of botany, a caryopsis (plural caryopses) is a form of simple dry fruit—one that is monocarpellary (formed from a single carpel) and indehiscent (not opening at maturity) and similar to an achene, except that in a caryopsis the pericarp is fused with the seed coat.

Therefore, the correct answer is option C. Caryopsis.

Note: The outer surface of the pericarp has an undulating appearance and a thin cuticle. The Testa is the outermost covering of the seed which protects the seed from bacterial infection or other damaging external sources.
The main aim of the seed coat is to protect the seed from any sort of mechanical or chemical-related, or even water damage.