Find the odd one out.

Choose the correct statement.

An animal that is initially male and then changes to female is called:

Select the incorrect statements from the following:
$A$. Digestive system in Platyhelminthes is incomplete.
$B$. Bilateral symmetry is a characteristic feature of adult Echinoderms.
$C$. Pseudocoelom is possessed by Aschelminthes.
$D$. Notochord is persistent throughout life in the class Chondrichthyes.
$E$. Members of class Reptilia maintain a constant body temperature.

Which character is common in phylum Echinodermata and Chordata?

Which of the following is common among a leech,a mosquito,a bed bug,and a rat?