Nereis is commonly called
earthworm
ringworm
roundworm
clemworm
Correct Answer :
D. clemworm
Related Questions
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 earthworm, the nephridia without neprostomes are
pharyngeal
integumentary
both (a) and (b)
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
Nereis is commonly called
earthworm
ringworm
roundworm
clemworm
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
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 enteronephric nephridia in earthworm are
integumentary
pharyngeal only
septal only
both (b) and (c)
Blood glands in Earthworm are associated with
excretion
digestion
secretion
none 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
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
The gizzard of earthworm is an organ of
secretion of slime
excretion
absorption of digested food
crushing the food
The fertilization in earthworms occurs in
oviduct
spermatheca
cocoon
clitellum
Spermathecae in earthworm represent
coating of sperms
structure for storing sperms
male copula to ry organs
female copulatory organs
Structure typically represented in every segment of earthworm is
ovary
chloragogen cell
testes
ganglia
In earthworm testes are situated in the
10th and 11th segments
11th and 12th segments
14th and 15th segments
none of these
Anticoagulant secreted by leech is
Hirudin
Heparin
Haematin
Haemozoin
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
Annelids show advancement over the nematoda in having
metameric segmentation
true coelom
closed circulatory system
all of these
Chetae are totally absent in
Nereis
Hirudinaria
Heteroneresis
Pheretima
Nephrostomes are found in
integumentary nephridia
septal nephridia
pharyngeal nephridia
none of these
In earthworm fertilisation occurs in
oviduct
water
cocoon
ootheca
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
In earthworm, the first segment in which mouth is situated is known as
prostomium
peristomium
stomium
protostomium
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
Pheretima is
sterile
unisexual
hermaphrodite
radial symmetrical
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
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