Question

Fill in the blanks.
_____do not have a backbone, while_____have it.

2 Cnidarians have______
symmetrical body.
3
_____and ______
live in the intestines of humans and cattle.
______are considered as a farmer's friend.
5 Annelids have special organs called_____
for excretion.​

Answer 1

Answer:

1. invertebrates do not have a backbone while vertebrates have it.

2. cnidarians have radially symmetrical body.

4. earthworms are considered as a farmer's friend.

5. Annelids have special organ called nephrida for excretion.

Answer 2

Answer:

Vertebrates ; bilateral ; bacteria and microbes ;

nephridia