The number of segments in leech is
26
33
44
120
Correct Answer :
B. 33
Related Questions
The gizzard of earthworm is an organ of
secretion of slime
excretion
absorption of digested food
crushing the food
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
The enteronephric nephridia in earthworm are
integumentary
pharyngeal only
septal only
both (b) and (c)
Metamerism is present in
House fly
Frog
Nereis
All of these
In earthworm fertilisation occurs in
oviduct
water
cocoon
ootheca
The female genital aperture in earthworm is present ventrally on segment
10th
12th
14th
18th
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 number of segments in leech is
26
33
44
120
Role of typhlosole in the intestine of earthworm is
to kill bacteria
to increase absorptive surface
to produce digestive enzymes
to control blood flow
Anticoagulant secreted by leech is
Hirudin
Heparin
Haematin
Haemozoin
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
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
Nephrostomes are found in
integumentary nephridia
septal nephridia
pharyngeal nephridia
none of these
The coelomic fluid in earthworm escapes through
dorsal pores
coelomic pores
nephridial pores
anus
A chitinous lining in earthworm is found in
pharynx
stomach
typholsole
gizzard
A skeleton like function during locomotion of Pheretima is performed by
alimentary canal laiden with mud
blood
coelmic fluid
ventral nerve cord
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
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
In earthworm, the first segment in which mouth is situated is known as
prostomium
peristomium
stomium
protostomium
Totally marine annelids belong to the
oligochaeta
polychaeta
hirudinea
archainnelida
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 dorsal blood vessel in earthworm is
distributive in 1-13 segments
collective in 1-13
completely distributive
completely collective
The chloragogen cells of earthworm are analogous to
liver of invertebrates
liver of vertebrates
kidney of vertebrates
uriniferous tubules of vertebrates
Chetae are totally absent in
Nereis
Hirudinaria
Heteroneresis
Pheretima
In earthworm, the genital papillae are situated ventrally on segments
17
18
19 and 22
17 and 19
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
Chromophil cells in earthworm are concerned with the secretion of
amylase
proteases
lipases
cocoon
Nereis is commonly called
earthworm
ringworm
roundworm
clemworm
Haemoglobin is dissolved in plasma is
Earthworm
Ascaris
Tapeworm
Insects