The dorsal blood vessel in earthworm is
distributive in 1-13 segments
collective in 1-13
completely distributive
completely collective
Correct Answer :
A. distributive in 1-13 segments
Related Questions
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
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
The excretory organs of earthworm are
kidneys
solenocytes
nephridia
green glands
In earthworm, the nephridia without neprostomes are
pharyngeal
integumentary
both (a) and (b)
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
Chromophil cells in earthworm are concerned with the secretion of
amylase
proteases
lipases
cocoon
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 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
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
Nephrostomes are found in
integumentary nephridia
septal nephridia
pharyngeal nephridia
none of these
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
A chitinous lining in earthworm is found in
pharynx
stomach
typholsole
gizzard
In earthworm, the first segment in which mouth is situated is known as
prostomium
peristomium
stomium
protostomium
The dorsal blood vessel in earthworm is
distributive in 1-13 segments
collective in 1-13
completely distributive
completely collective
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 fertilization in earthworms occurs in
oviduct
spermatheca
cocoon
clitellum
Metamerism is present in
House fly
Frog
Nereis
All of these
The coelomic fluid in earthworm escapes through
dorsal pores
coelomic pores
nephridial pores
anus
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
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
Haemoglobin is dissolved in plasma is
Earthworm
Ascaris
Tapeworm
Insects
Blood glands in Earthworm are associated with
excretion
digestion
secretion
none of these
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 circular muscles are highly developed in
body wall
gizzard
typholsole
pharynx
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
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