Which
of the following are the characteristics of the animals belonging to phylum platyhelminthese?
a) triploblastic, acoelomates and bilateral symmetrical and truly segmented
b) diploblastic, acoelomates and bilateral symmetrical and truly segmented
c) triploblastic, coelomates and bilateral symmetrical and truly segmented
d) triploblastic, acoelomates and
bilateral symmetrical and unsegmented or superficially segmented
Which of the following is/are true about platyhelminthese?
a) in free living form, the ectoderm is ciliated
b) in parasitic form the ectoderm is non-ciliated
c) organs of attachment are present in the form of hooks or suckers
d) all of these
Explanation: digestive system in free living developed but in parasitic form, it is poorly developed or completely absent.
In which of the following class/es of platyhelminthes, the digestive system is fully developed?
a) Class Cestoda
b) Class Trematoda
c) Class Turbellaria
d) both a and b
In which of the following class/es of platyhelminthes, the digestive system is poorl developed?
a) Class Cestoda
b) Class Trematoda
c) Class Turbellaria
d) all of these
In which of the following class of platyhelminthes, the digestive system is completely absent?
a) Class Cestoda
b) Class Trematoda
c) Class Turbellaria
d) none of these
Explanation: they are all parasitic.
Which of the following system/s is/are absent in platyhelminthese?
a) circulatory system
b) respiratory system
c) excretory and digestive
d) both a and b
