1 Coelom/Symmetry Phylum Example Pseudocoelom Platyhelminthes Ascaris
2 Coelom/Symmetry Phylum Example Bilateral Cnidaria Hydra
3 Coelom/Symmetry Phylum Eucoelom Annelida
4 Coelom/Symmetry Phylum Example Radial Ctenophora Obelia
Explanation:
C
| Coelom/ Symmetry | Phylum | Example |
---|
:--- | :--- | :--- | :--- |
1. | Pseudocoelom | Aschelminthes | Ascaris |
2. | Bilateral | Arthropoda | Insects |
3. | Eucoelom | Annelida | Pheretima |
4. | Radial | Coelentrata | Obelia |
467. Study the following statements regarding unisexual annelids.
(I) These are bristle worms
(II) Gonoducts are present
(III) Head is distinct with sense organs
(IV) Internal fertilization
The correct statements are
Options:
(a) I, III only
(c) I, II only
(b) II, IV only
(d) III, IV only
Ans. a
Exp. A
Annelids are coelomate and triploblastic, body is segmented, organ level of body organization. Nephridia are present for excretion, blood contains haemoglobin (red colour), and Setae helps in the locomotion.
These are bristle worms. Head is distinct with sense organs. Nereis, an aquatic form is dioecious but earthworms and leeches are monoecious.