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From the following statements select the wrong one -
A
Prawn has two pairs of antennae
B
Millipedes have two pairs of appendages in each segment of the body
C
Animals belonging to Phylum Porifera are exclusively marine
D
Nematocysts are characteristic of the phylum Cnidaria
Detailed Solution
Sponges (phylum Porifera) are mostly marine, but they are not exclusively marine.
Some sponges, such as Spongilla (freshwater sponge), live in fresh water.
So the statement that animals belonging to phylum Porifera are exclusively marine is wrong.
Prawn, a crustacean, has two pairs of antennae (antennules and antennae); true.
Millipedes (Diplopoda) have two pairs of legs on most body segments, because each apparent segment is formed by the fusion of two segments; true.
Nematocysts (stinging cells, cnidoblasts) are characteristic of phylum Cnidaria; true.
So the wrong statement is the one about Porifera being exclusively marine.
Some sponges, such as Spongilla (freshwater sponge), live in fresh water.
So the statement that animals belonging to phylum Porifera are exclusively marine is wrong.
Prawn, a crustacean, has two pairs of antennae (antennules and antennae); true.
Millipedes (Diplopoda) have two pairs of legs on most body segments, because each apparent segment is formed by the fusion of two segments; true.
Nematocysts (stinging cells, cnidoblasts) are characteristic of phylum Cnidaria; true.
So the wrong statement is the one about Porifera being exclusively marine.