Body cavity is the cavity present between body wall and gut wall. In some animals, the body cavity is not lined by mesoderm. Such animals are called
1. | Acoelomate | 2. | Pseudocoelomate |
3. | Coelomate | 4. | Haemocoelomate |
Triploblastic organization, bilateral symmetry but lack of coelom will be seen in:
1. | Planaria | 2. | Pheretima |
3. | Periplaneta | 4. | Pinctada |
The number of correct statements regarding hemichordates from the given is:
I. | A stomochord is present in the collar region |
II. | Circulation is of open type |
III. | Excretory organ is proboscis gland |
IV. | Development is indirect |
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |
Which one of the following is not a poisonous snake?
1. | Cobra | 2. | Viper |
3. | Python | 4. | Krait |
Water exits from a sponge through the:
1. | Spicule | 2. | Choanocyte |
3. | Amoebocyte | 4. | Osculum |
Icthyophis is a/an:
1. Tunicate chordate | 2. Flightless bird |
3. Limbless amphibian | 4. Egg-laying mammal |
Which of the following is not an Arthropod characteristic?
1. | Jointed appendages | 2. | Periodic molting |
3. | Closed circulation | 4. | Articulated exoskeleton |
In which of the following animals, the body is cylindrical and is composed of an anterior proboscis, a collar and a long trunk?
1. | Hemichordates | 2. | Urochordates |
3. | Cephalochordates | 4. | Vertebrate chordates |
A water vascular system is characteristically present in:
1. | Annelids | 2. | Porifers |
3. | Echinoderms | 4. | Cartilaginous fishes |
In Amphibia:
I: | Skin is moist without scales |
II: | A tympanum represents the ear |
III: | Fertilization is external |
1. | Only I and II are correct | 2. | Only I and III are correct |
3. | Only II and III are correct | 4. | I, II, and III are correct |