Q. No.1. Annelids and arthropods - Bilateral symmetry
2. Sponges - Acoelomates
3. Coelenterates and Ctenophores - Radial symmetry
4. Platyhelminthes - Diploblastic organisation
Hermaphroditism is found in which phyla?
(1) Ctenophora
(2) Platyhelminthes
(3) Porifera
(4) All of these.
Planaria posses high capacity of
(1) metamorphosis
(2) regeneration
(3) alternation of generation
(4) bioluminescence
Which one of the following kinds of animals are triploblastic?
(1) Flat worms
(2) Sponges
(3) Ctenophores
(4) Corals
The function of flame cells are
(1) Digestion and excretion
(2) Attachment and osmoregulation
(3) Anchorage and excretion
(4) Excretion and osmoregulation
Presence of flame cells is a characteristic feature of
(1) Nereis
(2) Taenia
(3) Hirudinaria
(4) Pheretima
In Planaria, waste material of food digestion and Nitrogenous waste material removed from
1. Mouth and mouth
2. Body wall and body wall
3. Mouth and Flame-cell
4. Mouth and Body wall
Choose the correct statement
1. All members of phylum echinodermata are marine and parasitic
2. Bioluminescence is well marked in cnidarians
3. Ctenophores are strictly dioecious
4. Platyhelminthes possess organ level of organisation and an incomplete digestive tract
Which one of the following statements is incorrect?
| 1. | Mesoglea is present in between ectoderm and endoderm in Obelia |
| 2. | Asterias exhibits radial symmetry |
| 3. | Fasciola is a pseudocoelomate animal |
| 4. | Taenia is a triploblastic animal |
| A: | Platyhelminthes are triploblastic, pseudocoelomate and bilaterally symmetrical organisms. |
| B: | Ctenophores reproduce only sexually and fertilization is external. |
| C: | In tapeworm, fertilization is internal but sexes are not separate. |
| D: | Ctenophores are exclusively marine, diploblastic and bioluminescent organisms. |
| E: | In sponges, fertilization is external and development is direct. |
Choose the correct answer from the options given below:
| 1. | (A), (C) and (D) only | 2. | (B), (C) and (D) only |
| 3. | (A) and (E) only | 4. | (B) and (D) only |
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