In earthworm, the septal nephridia put their excretory discharge into
intestine
blood
coelom
gizzard
Correct Answer :
A. intestine
Related Questions
The dorsal blood vessel in earthworm is
distributive in 1-13 segments
collective in 1-13
completely distributive
completely collective
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
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
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
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)
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
Nephrostomes are found in
integumentary nephridia
septal nephridia
pharyngeal nephridia
none of these
The enteronephric nephridia in earthworm are
integumentary
pharyngeal only
septal only
both (b) and (c)
Annelids show advancement over the nematoda in having
metameric segmentation
true coelom
closed circulatory system
all of these
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 septal nephridia put their excretory discharge into
intestine
blood
coelom
gizzard
Role of typhlosole in the intestine of earthworm is
to kill bacteria
to increase absorptive surface
to produce digestive enzymes
to control blood flow
Nereis is commonly called
earthworm
ringworm
roundworm
clemworm
A skeleton like function during locomotion of Pheretima is performed by
alimentary canal laiden with mud
blood
coelmic fluid
ventral nerve cord
The coelomic fluid in earthworm escapes through
dorsal pores
coelomic pores
nephridial pores
anus
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
Spermathecae in earthworm represent
coating of sperms
structure for storing sperms
male copula to ry organs
female copulatory organs
In earthworm, the genital papillae are situated ventrally on segments
17
18
19 and 22
17 and 19
Chetae are totally absent in
Nereis
Hirudinaria
Heteroneresis
Pheretima
In earthworm, the circular muscles are highly developed in
body wall
gizzard
typholsole
pharynx
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
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
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
Metamerism is present in
House fly
Frog
Nereis
All of these
The female genital aperture in earthworm is present ventrally on segment
10th
12th
14th
18th
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
Chromophil cells in earthworm are concerned with the secretion of
amylase
proteases
lipases
cocoon
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