Question

Match the following.

List-I	List-II
a) Pericardial glands	$1)$ Molluscs
b) Antennary glands	$2)$ Rotifers
c) Protonephridia (solenocytes)	$3)$ Arthropods
d) Protonephridia (flame bulbs)	$4)$ Lancelets

• A. A-I, B-III, C-IV, D-II
• B. A-II, B-III, C-IV, D-I
• C. A-II, B-I, C-III, D-V
• D. A-II, B-I, C-V, D-III

Answer 1

The correct option is A A-I, B-III, C-IV, D-II

The pericardium is the protective layer of the heart. It consists of two layers, an outer fibrous layer and the inner serous layer. The serous layer again is made up of two membranes enclosing the pericardial cavity. Molluscs have a true body cavity or coelom. They posses pericardial glands. Antennary glands are also called as green glands. They lie enclosed within the coxal segment of each antenna. Each gland has three parts, namely Sac, labyrinth and bladder. These are seen in crustaceans like arthropods. Protonephridia are of two types, solenocytes and flame bulbs. These are present in animals that lack a true coelom. The protonephridia terminates in the enlarged bulb-like structure and have cilia inside. If there is only one cilium, it is called as solenocyte. If there are more cilia, it is called as flame bulbs. Lancelets have solenocytes as excretory structure. Rotifers have flame bulbs.

Thus, the correct answer is 'A-I, B-III, C-IV, D-II.'