A marine cartilaginous fish that can produce electric current is
Pristis
Torpedo
Trygon
Trygon
B.
Torpedo
Torpedo is a marine cartilaginous fish which produces 8-220 volt electric charge (current) depending on species. Their electric organs are modified lateral muscle plates innervatted by carnrial nerves.
Trygon (sting ray) resembles electric ray in many aspects but is devoid of electricity discharging (or producing) organs.
Scoliodon (dog fish) is known for its great sense of smell. Pristis or common saw fish (also known as carpenters shark) is charactesised by a long, narrow, flattened rostrum lined with sharp transverse teeth to resembles a saw.
Planaria possess high capacity of
metamorphosis
regeneration
alternation of generation
alternation of generation
Body having meshwork of cells, internal cavities lined with food filtering flagellated cells and indirect development are the characteristic of phylum
Coelenterate
Porifera
Mollusca
Mollusca
Which one of the following living organisms completely lacks a cell wall?
Cyanobacteria
Sea-fan (Gorgonia)
Saccharomyces
Saccharomyces
Select the taxon mentioned that represents both marine and freshwater species
Echinoderms
Ctenophora
Cephalochordata
Cephalochordata
