______ are devoid of respiratory, excretory and circulatory organs.

Biology Nguyễn Thành Trương 0 Nhận xét

______ are devoid of respiratory, excretory and circulatory organs.

A

Threadworms

B

Sponges

C

Tapeworms

D

Liver fluke

Answer:

The correct option is B. Sponges

Note