Question

A capsular fruit splits up through the back of locules. It is
A. Septicidal
B. Septifragal
C. Loculicidal
D. Denticidal

Answer 1

Hint: Dehiscence of the capsule occurs through various regions of the fruit. Locules can be of different types. Loculicidal capsules can split through the back of locules. Septicidal capsules include septa in the dehiscence while septifragal capsules form valves.

Complete answer:
Capsule is a fleshy dehiscent fruit produced by many species of angiosperms. It is derived from a compound ovary. It has two carpels. Locule is a chamber present within the fruit. On the basis of number of locules present in the ovary and fruit, it can be classified as unilocular, bi-locular, trilocular or multilocular. Number of carpels in gynoecium is equal to or less than the number of carpels. It contains ovules or seeds which are separated by septa. When the capsule matures, it dehiscent or split into parts to release seeds within. Some of the capsules are indehiscent. For example: Adansonia digitata, Alphitonia, and Merciera.
On the basis of type and location of dehiscence capsules are classified into four types. Loculicidal, septicidal, circumscissile, and poricidal capsule.
Loculicidal capsules consist of longitudinal lines that can dehiscence radially. In the case of absence of septa, lines lie between the placentae. In this type of capsular fruit dehiscence occur through the back of locules. It is present in the members of Liliaceae such as Lilium. 

In septicidal capsules dehiscence lines aligned with the sutures of the ovary septa or placentae it is present between the carpals. Both these types of capsules split into distinguishable segments called valves. Septifragile capsule also called as valvular capsule septa. The dehiscence may occur from septa or placentae as valves. From the above information we can say that loculicidal capsules split up through the back of locules.

So, the correct answer is option C.

Note: Pericarp (fruit wall) includes the valves that have split away. Valves may be attached to the fruit or fall off. Split can occur between carpels or sometimes carpels may split open. If the dehiscence occurs through pores in the capsule, it is called a poricidal capsule. For example: Papaver etc. Nigella, orchid, willow, cotton, and jimson weed are some examples of plants that produce capsules.