Question

external characters of hemichordata

Answer 1

Solitary and colonial, mostly tubicolous, exclusively marine.

2. Body soft, fragile, vermiform and divisible into proboscis, collar and trunk

Answer 2

and reproductive organs.
Characteristic
Features of Phylum
Hemichordata
Hemichordata is
bilaterally
symmetrical and
triploblastic
animal.
They are
exclusively
marine animals.
They can be
solitary or in
colonies.
Hemichordata
have a true body
cavity or coelom.
The digestive
tract is complete
with an anus
and can be in
the form of a U
shaped tube or
straight.
A buccal
diverticulum is
present in the
proboscis.
Body is divided
into three
regions –
Proboscis, Collar
and Trunk.
Circulatory
system in open
type.
Respiration
occurs through
gills.
The proboscis
has a
glomerulus,
which is the
excretory organ.
A primitive
nervous system
is present.
Sexes are
separate or
united.
Reproduction is
mostly sexual
reproduction.
Fertilization is
external.
Development is
mostly indirect.
But a few species
exhibit direct
development.
.
.
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