The coelomic fluid in earthworm escapes through
dorsal pores
coelomic pores
nephridial pores
anus
Correct Answer :
A. dorsal pores
Related Questions
Earthworms do not have any respiratory organs because
they do not need them
they are burrowing in habit
there is no sufficient space for such organs
the surface acts as an absorptive area which is larger than the volume
Role of typhlosole in the intestine of earthworm is
to kill bacteria
to increase absorptive surface
to produce digestive enzymes
to control blood flow
The enteronephric nephridia in earthworm are
integumentary
pharyngeal only
septal only
both (b) and (c)
Blood glands in Earthworm are associated with
excretion
digestion
secretion
none of these
Nephrostomes are found in
integumentary nephridia
septal nephridia
pharyngeal nephridia
none of these
Locomotion in Earthworm is directly facilitated by
mucus secreted by epidermis
segmentation of the body
rhythmic contraction of segments
setae and contraction of segments
The coelomic fluid in earthworm escapes through
dorsal pores
coelomic pores
nephridial pores
anus
Chromophil cells in earthworm are concerned with the secretion of
amylase
proteases
lipases
cocoon
In earthworm, the septal nephridia put their excretory discharge into
intestine
blood
coelom
gizzard
Haemoglobin is dissolved in plasma is
Earthworm
Ascaris
Tapeworm
Insects
Structure typically represented in every segment of earthworm is
ovary
chloragogen cell
testes
ganglia
The fertilization in earthworms occurs in
oviduct
spermatheca
cocoon
clitellum
Chloragogen cells of Pheretima play a role very much like that of
Liver of vertebrates
Choanocytes of sponges
Malpighian tubules of vertebrates
None of these
The dorsal blood vessel in earthworm is
distributive in 1-13 segments
collective in 1-13
completely distributive
completely collective
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 fertilisation occurs in
oviduct
water
cocoon
ootheca
A chitinous lining in earthworm is found in
pharynx
stomach
typholsole
gizzard
In earthworm, the genital papillae are situated ventrally on segments
17
18
19 and 22
17 and 19
In earthworm, the first segment in which mouth is situated is known as
prostomium
peristomium
stomium
protostomium
Nereis is commonly called
earthworm
ringworm
roundworm
clemworm
In earthworm, the nephridia without neprostomes are
pharyngeal
integumentary
both (a) and (b)
none of these
The direction of blood flow in the dorsal vessel of earthworm is
from the posterior to the anterior end
from the anterior end to the posterior end
from dorsal vessel to ventral vessel
alternately in both directions (a) and (b)
The excretory organs of earthworm are
kidneys
solenocytes
nephridia
green glands
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
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
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
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
A skeleton like function during locomotion of Pheretima is performed by
alimentary canal laiden with mud
blood
coelmic fluid
ventral nerve cord
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
The female genital aperture in earthworm is present ventrally on segment
10th
12th
14th
18th