In earthworm fertilisation occurs in
oviduct
water
cocoon
ootheca
Correct Answer :
C. cocoon
Related Questions
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 number of segments in leech is
26
33
44
120
Totally marine annelids belong to the
oligochaeta
polychaeta
hirudinea
archainnelida
Annelids show advancement over the nematoda in having
metameric segmentation
true coelom
closed circulatory system
all 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
Metamerism is present in
House fly
Frog
Nereis
All of these
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
Pheretima is
sterile
unisexual
hermaphrodite
radial symmetrical
Locomotion in Earthworm is directly facilitated by
mucus secreted by epidermis
segmentation of the body
rhythmic contraction of segments
setae and contraction of segments
Spermathecae in earthworm represent
coating of sperms
structure for storing sperms
male copula to ry organs
female copulatory organs
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
In earthworm, the septal nephridia put their excretory discharge into
intestine
blood
coelom
gizzard
Chromophil cells in earthworm are concerned with the secretion of
amylase
proteases
lipases
cocoon
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
Chetae are totally absent in
Nereis
Hirudinaria
Heteroneresis
Pheretima
Nereis is commonly called
earthworm
ringworm
roundworm
clemworm
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
Structure typically represented in every segment of earthworm is
ovary
chloragogen cell
testes
ganglia
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
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 female genital aperture in earthworm is present ventrally on segment
10th
12th
14th
18th
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
In earthworm fertilisation occurs in
oviduct
water
cocoon
ootheca
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
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)
The gizzard of earthworm is an organ of
secretion of slime
excretion
absorption of digested food
crushing the food
A skeleton like function during locomotion of Pheretima is performed by
alimentary canal laiden with mud
blood
coelmic fluid
ventral nerve cord
The excretory organs of earthworm are
kidneys
solenocytes
nephridia
green glands