In chordates, the tail is:

1.	Post anal and segmented
2.	Post anal and unsegmented
3.	Pre anal and segmented
4.	Pre anal and unsegmented

 

The most important reason for the fact that reptiles were the first animals to be successful on land is:

Euplectella [Venus Flower Basket], shown in the figure below, belongs to:

Pinworm, Hookworm, and Filaria worm belong to:

Bilharzia is caused by a/an:
1. Flatworm
2. Roundworm
3. Annelid
4. Arthropod

Which of the following is not a character of deuterostomes?
1. Radial cleavage

2. Schizocoelous coelom

3. Indeterminate cleavage

4. Blastopore forms anus

Icthyophis is a/an:

Which of the following does not belong to Protostomia?
1. Annelids
2. Mollusks
3. Echinoderms
4. Arthropods

Approximately what percentage of existing animal species are invertebrates?

Water exits from a sponge through the: