In earthworm, the genital papillae are situated ventrally on segments
17
18
19 and 22
17 and 19
Correct Answer :
D. 17 and 19
Related Questions
The enteronephric nephridia in earthworm are
integumentary
pharyngeal only
septal only
both (b) and (c)
Which region in earthworm is the forest of nephridia ?
Pharyngeal region
Clitellar region
Intestinal region
Typhlosolar region
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 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
The number of segments in leech is
26
33
44
120
Locomotion in Earthworm is directly facilitated by
mucus secreted by epidermis
segmentation of the body
rhythmic contraction of segments
setae and contraction of segments
In earthworm, the genital papillae are situated ventrally on segments
17
18
19 and 22
17 and 19
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
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
In earthworm, the first segment in which mouth is situated is known as
prostomium
peristomium
stomium
protostomium
The chloragogen cells of earthworm are analogous to
liver of invertebrates
liver of vertebrates
kidney of vertebrates
uriniferous tubules of vertebrates
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)
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
Blood glands in Earthworm are associated with
excretion
digestion
secretion
none of these
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
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
Pheretima is
sterile
unisexual
hermaphrodite
radial symmetrical
Nephrostomes are found in
integumentary nephridia
septal nephridia
pharyngeal nephridia
none of these
In earthworm testes are situated in the
10th and 11th segments
11th and 12th segments
14th and 15th segments
none of these
In earthworm, the nephridia without neprostomes are
pharyngeal
integumentary
both (a) and (b)
none of these
The coelomic fluid in earthworm escapes through
dorsal pores
coelomic pores
nephridial pores
anus
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
In earthworm, the circular muscles are highly developed in
body wall
gizzard
typholsole
pharynx
Chromophil cells in earthworm are concerned with the secretion of
amylase
proteases
lipases
cocoon
The female genital aperture in earthworm is present ventrally on segment
10th
12th
14th
18th
A chitinous lining in earthworm is found in
pharynx
stomach
typholsole
gizzard
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