381.
Male genital aperture of earthworms is located in the segment
A
13
B
14
C
19
D
18
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Male genital aperture of earthworms is located in the segment
13
14
19
18
Major nitrogenous excertory material of Earthworm by
Uric acid
Ammonia
Urea
Amino acids
In earthworm, ovary is situated in segment
13
9
10
26
In Earthworm, genital papillae occur in segments
16 and 17
16 and 18
17 and 19
17 and 18
In earthworm fertilization occurs in
oviduct
water
coon
Ootheca
Earthworm possesses hearts
6 pairs
4 pairs
2 pairs
1
Earthworm is placed in the group of
Oligochaeta
Polychaeta
Hirudinea
Crustacea
Earthworm helps farmers by
Destroying harmful bacteria
Destroying harmful and insects
Making soil porous and loose
Both (a) and (b)
Earthworm have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton .It is due to
satae
gut peristalsis
setae
coelomic fluid
Earthworm has
Two eyes
Many eyes
No eyes
One eyes
Copulation in Earthworm occurs during
Night in water
Night in rainy season
Night in summer season
Day in rainy season
Chromophil cells in earthworm are concerned with the secretion of
Amylase
Protease
Lipases
Coccon
Body of earthworm is divided into how many similar segments which are called metameres or somites?
60 - 120
100 - 120
120 - 140
120 or more
Annelids are
Radially symmetrical
Externally segmented
Triploblastic
Pseudocoelomate
Which type of molecule contains genetic information that is passed from parents to offspring?
Protein molecules
Carbohydrate molecules
Fat molecules
DNA molecules
Which of the following statements about double-stranded DNA is false?
The helix has two grooves called the major groove and the minor groove.
The bases are on the outside of the helix.
The backbone contains alternating ribose sugar and phosphate groups.
The two strands have an antiparallel orientation.
Which of the following describes the relationship between chromosomes and DNA molecules?
Each DNA molecule is made of more than one chromosome.
There is no relationship between chromosomes and DNA molecules.
Each chromosome is made of a single DNA molecule.
Each chromosome is made of more than one DNA molecule.
Which of the following contain hereditary information?
Genes but not chromosomes
Neither chromosomes nor genes
Chromosomes and genes
Chromosomes but not genes
Which of the following bases pairs with guanine?
Cytosine
Thymine
Adenine
Guanine
Which of the following are found in both DNA and RNA?
phosphate groups, guanine, and cytosine
phosphate groups, guanine, and thymine
ribose, phosphate groups, and adenine
deoxyribose, phosphate groups, and guanine