Question

Which among the following are incorrectly matched?

Animal	Characteristic	Taxon
A. Crabs	Nephridia	Arthropoda
B. Earthworm	Metamerism	Annelida
C. Spiders	Jointed appendages	Arthropoda
D. Nereis	Parapodia	Annelida

• A. A
• B. B
• C. C
• D. D

Answer 1

The correct option is A A

Crabs and spiders have jointed appendages and are a part of phylum Arthropoda. They have malpighian tubules for excretion.

Nephridia are found in annelids. They are special excretory organs that help in osmoregulation, which is maintenance of water content as well as in getting rid of the wastes of the body.

Earthworm or Pheretima and Nereis belong to the phylum Annelida and they have metameric segmentation, i.e., the body is externally and internally divided into segments with a serial repetition of at least some organs.

Aquatic annelids such as Nereis possess leg appendages known as parapodia in every segment of their body for swimming.