Question

1) __________ is connecting link between annelida and arthropoda.
a. Lungfish
b. Peripatus
c. Whale
d. Duck-billed platypus

Answer 1

Answer:

The living animals which posses some characters of two different groups of animal are called connecting link. Peripatus is a primitive arthropod having jointed paired legs, compound eyes and tracheas like other arthropods but also displays certain annelidan characteristics, such as worm-like segmented body, non-chitinous cuticle and segmental nephridia. Thus, it forms a connecting link between Annelida and Arthropoda.

Answer 2

Answer:

Peripatus is the connecting link between Annelida and Arthropoda. The correct option is b.

Explanation:

• When an organism has characteristics of two different organisms, then that organism is considered as connecting link.
• Peripatus is a viviparous arthropod. It acts as the connecting link between Annelida and Arthropoda. They have segmented bodies, nephridia, and unjointed legs like Annelida and also possess trachea, hemocoel, and heart with Ostia like Arthropoda.

So we can say that the Peripatus acts as connecting link.

Hence, the correct option is b.