In earthworm, the first segment in which mouth is situated is known as
prostomium
peristomium
stomium
protostomium
Correct Answer :
D. protostomium
Related Questions
The cliteilum singulum in earthworm is formed by
12,13 and 14 segments
13,14 and 15 segments
14,15 and 16 segments
16,17 and 1&segments
A chitinous lining in earthworm is found in
pharynx
stomach
typholsole
gizzard
In earthworm fertilisation occurs in
oviduct
water
cocoon
ootheca
The excretory organs of earthworm are
kidneys
solenocytes
nephridia
green glands
Copulation occurs between two earthworms
generally at night during rainy season
generally at day time during rainy season
at night during winter season
at night during summer season
The septal and pharyngeal nephridia open into the alimentary canal and are of enteronephric type. It is an adaptation for
conservation of water
conservation of heat
regulation of temperature
regulation of amino acids
Locomotion in Earthworm is directly facilitated by
mucus secreted by epidermis
segmentation of the body
rhythmic contraction of segments
setae and contraction of segments
Blood glands in Earthworm are associated with
excretion
digestion
secretion
none of these
Earthworm has no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton due to
setae
circular muscles
coelomic fluid
longitudinal muscles
Sperma thecae in earthworm are meant few
producing sperms
storage of its own sperms
storage of sperms of another earthworm after copulation
all of these
Chromophil cells in earthworm are concerned with the secretion of
amylase
proteases
lipases
cocoon
The nitrogenous waste in earthworm consist of about
40% urea and 40% uric acid
50% urea and 40% ammonia
40% ammonia and 20% amino acids
60% ammonia and 20% amino acids
Structure typically represented in every segment of earthworm is
ovary
chloragogen cell
testes
ganglia
In Pheretima, the blood glands are located
close to lateral hearts in segments 12 and 13
along the latero-oesophageal hearts in segments 12 and 13
both (a) and (b)
behind the pharyngeal mass in segments 4, 5 and 6
Totally marine annelids belong to the
oligochaeta
polychaeta
hirudinea
archainnelida
The coelomic fluid in earthworm escapes through
dorsal pores
coelomic pores
nephridial pores
anus
Chetae are totally absent in
Nereis
Hirudinaria
Heteroneresis
Pheretima
Nereis is commonly called
earthworm
ringworm
roundworm
clemworm
Pheretima is
sterile
unisexual
hermaphrodite
radial symmetrical
5. The pre-typhlosolar region in Pheretima extends from
fifth to twenty-sixth segment
first to twenty-sixth segment
fifteenth to twenty-sixth segment
immediately after clitellar region to twenty sixth segment
In earthworm, the septal nephridia put their excretory discharge into
intestine
blood
coelom
gizzard
Which of the following statements is correct ?
Blood of earthworm is blue in colour
Blood pigment of earthworm is haemocyanin
Blood pigment of earthworm is red and haemoglobin is dissolved in plasma
Blood of earthworm is red and haemoglobin is dissolved in RBC
Spermathecae in earthworm represent
coating of sperms
structure for storing sperms
male copula to ry organs
female copulatory organs
The terminal nephridial ducts of the septal nephridia of Pheretima open into
each intersegmental septum
septal excretory canal
lumen of the intestine
supra-intestinal excretory ducts
In earthworm testes are situated in the
10th and 11th segments
11th and 12th segments
14th and 15th segments
none of these
Metamerism is present in
House fly
Frog
Nereis
All of these
In earthworm, the circular muscles are highly developed in
body wall
gizzard
typholsole
pharynx
Nephrostomes are found in
integumentary nephridia
septal nephridia
pharyngeal nephridia
none of these
In earthworm, the first segment in which mouth is situated is known as
prostomium
peristomium
stomium
protostomium
The coelom in Pherethna is
continuous throughout
continuous throughout except in first 26 segments
continuous only in first four segments
divided into a number of compartments throughout