Phylum Porifera
Phylum Porifera: Overview
This Topic covers sub-topics such as Sycon, Phylum Porifera, Spongilla, Euspongia, Choanocytes, Class Hexactinellida, Spongocoel, Class Demospongiae and, Class Calcarea
Important Questions on Phylum Porifera
What is left, when bath sponges dries up?
Gemmule formation in sponges are useful in
Power of regeneration in sponges is due to
Assertion: Sponges belong to Porifera.
Reason: Sponges have canal system.
Assertion: Sponges have body organization of “cellular level”.
Reason: There is some physiological division of labour.
Spongilla belongs to a group of animals which are best described as multicellular organism with water vascular system. This statement is true or false?
Match the following:
| Classes | Examples | ||
| (A) | Demospongiae | (I) | Corallium |
| (B) | Anthozoa | (II) | Beroe |
| (C) | Hydrozoa | (III) | Euplectella |
| (D) | Nuda | (IV) | Obelia |
| (V) | Chalina |
The correct match is
Multicellular animals that exhibit cellular level organisation are
Fill in the blank with the correct answer from the bracket.
The skeleton is of calcareous spicules in _____. (Hyalonema, Spongilla, Sycon)
Which of the following organism is included in the class Calcarea.
Sycon is included in the class Hexactinellida.
Which of the following class comes under phylum Porifera?
Which of the following is not a characteristic feature of sponges?
Flagellated collar cells (choanocytes) is the characteristics of
Match the following
| Column | Column | ||
| Euplectella | Sea pen | ||
| Physalia | Pinworm | ||
| Pennatula | Venus flower basket | ||
| Enterobius | Midwife toad | ||
| Alytes | Portuguese man of war | ||
Classification of Phylum Porifera is based on:
Study the following statements.
I) Digestion in sponges is extra cellular.
II) Primary function of flame cells in flatworms is osmoregulation.
III) Clitellum is absent in unisexual annelids.
IV) Dipleurula larva is considered as the ancestor of echinoderms.
Fromthe above, the correct statements are-
Study the following statements
(I) Digestion in sponges is extra cellular
(II) Primary function of flame cells in flatworms is osmoregulation
(III) Clitellum is absent in unisexual annelids
(IV) Dipleurula larva is considered as the ancestor of echinoderms
Among the above, correct statements are
