The gizzard of earthworm is an organ of
secretion of slime
excretion
absorption of digested food
crushing the food
Correct Answer :
D. crushing the food
Related Questions
Haemoglobin is dissolved in plasma is
Earthworm
Ascaris
Tapeworm
Insects
Chetae are totally absent in
Nereis
Hirudinaria
Heteroneresis
Pheretima
The coelomic fluid in earthworm escapes through
dorsal pores
coelomic pores
nephridial pores
anus
The chloragogen cells of earthworm are analogous to
liver of invertebrates
liver of vertebrates
kidney of vertebrates
uriniferous tubules of vertebrates
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
Totally marine annelids belong to the
oligochaeta
polychaeta
hirudinea
archainnelida
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
Locomotion in Earthworm is directly facilitated by
mucus secreted by epidermis
segmentation of the body
rhythmic contraction of segments
setae and contraction of segments
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 earthworm testes are situated in the
10th and 11th segments
11th and 12th segments
14th and 15th segments
none of these
Which region in earthworm is the forest of nephridia ?
Pharyngeal region
Clitellar region
Intestinal region
Typhlosolar region
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
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
A chitinous lining in earthworm is found in
pharynx
stomach
typholsole
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
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 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
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 fertilization in earthworms occurs in
oviduct
spermatheca
cocoon
clitellum
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
In earthworm, the first segment in which mouth is situated is known as
prostomium
peristomium
stomium
protostomium
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
In earthworm, the nephridia without neprostomes are
pharyngeal
integumentary
both (a) and (b)
none of these
The female genital aperture in earthworm is present ventrally on segment
10th
12th
14th
18th
Anticoagulant secreted by leech is
Hirudin
Heparin
Haematin
Haemozoin