Totally marine annelids belong to the
oligochaeta
polychaeta
hirudinea
archainnelida
Correct Answer :
D. archainnelida
Related Questions
A chitinous lining in earthworm is found in
pharynx
stomach
typholsole
gizzard
Nephrostomes are found in
integumentary nephridia
septal nephridia
pharyngeal nephridia
none of these
In earthworm, the nephridia without neprostomes are
pharyngeal
integumentary
both (a) and (b)
none of these
Structure typically represented in every segment of earthworm is
ovary
chloragogen cell
testes
ganglia
In earthworm, the circular muscles are highly developed in
body wall
gizzard
typholsole
pharynx
The gizzard of earthworm is an organ of
secretion of slime
excretion
absorption of digested food
crushing the food
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
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
The enteronephric nephridia in earthworm are
integumentary
pharyngeal only
septal only
both (b) and (c)
The number of segments in leech is
26
33
44
120
Pheretima is
sterile
unisexual
hermaphrodite
radial symmetrical
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
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
Spermathecae in earthworm represent
coating of sperms
structure for storing sperms
male copula to ry organs
female copulatory organs
Blood glands in Earthworm are associated with
excretion
digestion
secretion
none of these
Chromophil cells in earthworm are concerned with the secretion of
amylase
proteases
lipases
cocoon
Annelids show advancement over the nematoda in having
metameric segmentation
true coelom
closed circulatory system
all of these
A skeleton like function during locomotion of Pheretima is performed by
alimentary canal laiden with mud
blood
coelmic fluid
ventral nerve cord
In earthworm testes are situated in the
10th and 11th segments
11th and 12th segments
14th and 15th segments
none of these
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
The dorsal blood vessel in earthworm is
distributive in 1-13 segments
collective in 1-13
completely distributive
completely collective
Metamerism is present in
House fly
Frog
Nereis
All of these
Nereis is commonly called
earthworm
ringworm
roundworm
clemworm
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
Which region in earthworm is the forest of nephridia ?
Pharyngeal region
Clitellar region
Intestinal region
Typhlosolar region
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 coelomic fluid in earthworm escapes through
dorsal pores
coelomic pores
nephridial pores
anus
In earthworm, the first segment in which mouth is situated is known as
prostomium
peristomium
stomium
protostomium
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