Multiple Choice QuestionsBody having meshwork of cells, internal cavities lined with food filtering flagellated cells and indirect development are the characteristic of phylum
Coelenterate
Porifera
Mollusca
Mollusca
Select the taxon mentioned that represents both marine and freshwater species
Echinoderms
Ctenophora
Cephalochordata
Cephalochordata
Which one of the following living organisms completely lacks a cell wall?
Cyanobacteria
Sea-fan (Gorgonia)
Saccharomyces
Saccharomyces
Planaria possess high capacity of
metamorphosis
regeneration
alternation of generation
alternation of generation
B.
regeneration
Planaria are the type of flatworms belonging to phylum-Platyhelminthes. They are the simplest from of multicellular animal. The have a high capacity of regeneration of new tissue at the wound site via cell proliferation ( blastema formation) and the remodelling of pre-existing tissue to restore symmetry and proportion. This is due rieoblast cells.
The cells are usually scattered through out the body and are able to participate in any type of development. The regenerative capacity of different body sections is an indicator of the presence of different numbers of neoblast cells.
A marine cartilaginous fish that can produce electric current is
Pristis
Torpedo
Trygon
Trygon
In which one of the following, the genus name, its two characters and its phylum are not correctly matched, whereas the remaining three are correct?
| Genus Name | Two characters | Phylum | |
| pila | (i) (ii) |
Body segmented Mouth with Radula |
Mollusca |
| Genus Name | Two characters | Phylum | |
| Asterias | (i) (ii) |
Spiny skinned Water vascular system |
Echinodermatac |
| Genus Name | Two characters | Phylum | |
| Sycon | (i) (ii) |
Pore bearing Canal system |
Porifera |
| Genus Name | Two characters | Phylum | |
| Sycon | (i) (ii) |
Pore bearing Canal system |
Porifera |
Which one of the following pairs is wrongly matched?
Ginkgo – Archegonia
Salvinia – Prothallus
Viroids – RNA
Viroids – RNA
Which one of the following pairs of animals are similar to each other pertaining to the feature stated against them?
Pteropus and Ornithorhyncus - Viviparity
Garden lizard and Crocodile - Three chambered heart
Ascaris and Ancylostoma - Metameric segmentation
Ascaris and Ancylostoma - Metameric segmentation
Which one of the following categories of animals, is correctly described with no single exception in it?
All reptiles possess scales, have a three chambered heart and are cold blooded (poikilothermal)
All bony fishes have four pairs of gills and an operculum on each side
All sponges are marine and have collared cells
All sponges are marine and have collared cells
Which of the following characteristics is mainly responsible for diversification of insects on land?
Segmentation
Bilateral symmetry
Exoskeleton
Exoskeleton
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