Which region in earthworm is the forest of nephridia ?
Pharyngeal region
Clitellar region
Intestinal region
Typhlosolar region
Correct Answer :
B. Clitellar region
Related Questions
Totally marine annelids belong to the
oligochaeta
polychaeta
hirudinea
archainnelida
The coelomic fluid in earthworm escapes through
dorsal pores
coelomic pores
nephridial pores
anus
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
Anticoagulant secreted by leech is
Hirudin
Heparin
Haematin
Haemozoin
The chloragogen cells of earthworm are analogous to
liver of invertebrates
liver of vertebrates
kidney of vertebrates
uriniferous tubules of vertebrates
Nephrostomes are found in
integumentary nephridia
septal nephridia
pharyngeal nephridia
none of these
The dorsal blood vessel in earthworm is
distributive in 1-13 segments
collective in 1-13
completely distributive
completely collective
The number of segments in leech is
26
33
44
120
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
In earthworm, the circular muscles are highly developed in
body wall
gizzard
typholsole
pharynx
The excretory organs of earthworm are
kidneys
solenocytes
nephridia
green glands
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
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
The enteronephric nephridia in earthworm are
integumentary
pharyngeal only
septal only
both (b) and (c)
Spermathecae in earthworm represent
coating of sperms
structure for storing sperms
male copula to ry organs
female copulatory organs
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
In earthworm, the nephridia without neprostomes are
pharyngeal
integumentary
both (a) and (b)
none of these
In earthworm fertilisation occurs in
oviduct
water
cocoon
ootheca
The gizzard of earthworm is an organ of
secretion of slime
excretion
absorption of digested food
crushing the food
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
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 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)
Earthworm is useful because it
helps in fixing atmospheric nitrogen
helps in making the land porous
kills harmful bacteria of the soil
helps in making the land fertile by turning it upside down
In the blood vascular system of earthworm there are four pairs of hearts present in the first 13 segments. These are situated in the segments
7th, 8 th, 9th and 10th
8th, 10th, 12th and 15th
8th, 9th, 12th and 13th
7th, 9th, 12th and 13th
The female genital aperture in earthworm is present ventrally on segment
10th
12th
14th
18th
Blood glands in Earthworm are associated with
excretion
digestion
secretion
none of these
Pheretima is
sterile
unisexual
hermaphrodite
radial symmetrical
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