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CBSE Questions for Class 9 Biology Diversity In Living Organisms Quiz 7 - MCQExams.com
CBSE
Class 9 Biology
Diversity In Living Organisms
Quiz 7
The group Pisces includes:
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Mandarin fish
0%
Rohu
0%
Dog fish
0%
All of the above
Explanation
Mandarin fish, rohu, dogfish are all aquatic animals. They are cold-blooded animals with streamlined bodies.
They belong to the phylum Chordata and class Pisces.
Hence, the correct answer is option D.
Living things are divided into .......... kingdoms.
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0%
4
0%
3
0%
5
0%
2
Explanation
Very early on, scientists began grouping the living organisms under different categories. Some biologists classified organisms into plants and animals. Ernst Haeckel, Robert Whittaker, and Carl Woese are some biologists who attempted a broader system of classification. Amongst these, the Five Kingdom Classification proposed by Robert Whittaker stood out and is widely used. It consists of Monera, Protista, Fungi, Plantae and Animalia
So, the correct answer is '5'
Arthropoda have ............... symmetry.
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Radial
0%
Bilateral
0%
Lateral
0%
Asymmetric
Explanation
When
the body of an organism can be divided into identical left and
right halves in only one plane, it is bilateral
symmetry. E.g. Vertebrates, arthropods, annelids.
When
any plane passing through the central axis of
the body divides the organism into two identical
halves, it is called radial symmetry. E.g.
Coelenterates, ctenophores and echinoderms.
W
hen any plane that passes through the centre
does not divide the body into equal halves, the organism is assymetrical. E.g. Sponges.
So, the correct answer is option B.
Organisms which are single-celled, have no chloroplast or nucleus are classified under:
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Kingdom Protista
0%
Kingdom Monera
0%
Kingdom Fungi
0%
None of the above
Explanation
The five kingdom classification was proposed by R. H. Whittaker in the year 1969. The kingdom Monera is comprised of unicellular prokaryotic organisms. This group contains the bacteria and the cyanobacteria species. These organisms do not have well-developed cell organelles like nucleus, mitochondria and chloroplast. The other four kingdoms, Protista, Fungi, Plantae and Animalia are composed of all the eukaryotic organisms.
Thus, the correct answer is option B.
Which of the following is not a characteristic of hemichordates?
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They are widely distributed in shallow, marine and tropical waters
0%
They have epidermal nervous system
0%
Most of them have pharyngeal slits
0%
They have cylindrical body
Explanation
Hemichordates may not always have a cylindrical body, cylindrical body is the main characteristics of nematodes. Rest all are the characteristics of hemichordates.
Organisms which are single celled but are motile and have nucleus are included in
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0%
Kingdom Protista
0%
Kingdom Animalia
0%
Kingdom Monera
0%
Kingdom Fungi
Explanation
The five kingdom classification was proposed by R. H. Whittaker which classifies all the living organisms into these five kingdoms. The Protista is a kingdom of simple single-celled eukaryotic organisms. They have well developed cell organelles like the nucleus, mitochondria, chloroplast, etc on the basis of which they have been classified into plant and animals like protists. These are mostly aquatic organisms which have flagellated structures for movement.
Thus, the correct answer is option A.
Hemichordata belong to the phylum of ........... animals.
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Land
0%
Marine
0%
Terrestrial
0%
None of the above
Explanation
Hemichordata is a phylum of marine animals, generally considered the sister group of the echinoderms. They include two main classes: Enteropneusta (acorn worms) and Pterobranchia.
So, the correct answer is option B.
Which of the following list contains only hemichordates?
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Earthworm
0%
Acorn worm
0%
Hydra
0%
Liverfluke
Explanation
Earthworm is an annelid, hydra is a coelenterate, liverfluke is a platyhelminthes, acorn worm (Balanoglossus, Saccoglossus) is a hemichordate belonging to class Enteropneusta.
Which of the following is not an example of Protochordata ?
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Balanoglossus
0%
Herdemania
0%
Amphioxus
0%
Asterias
Explanation
Asterias
( starfish) is an example of Echinodermata and not Protochordata. Echinoderms are marine animals found in the depths of the ocean as well as in the intertidal zone.
Thus, the correct answer is option D.
Hemichordata is considered as the sister group of
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0%
Arthropoda
0%
Echinoderms
0%
Molluscs
0%
Both A and C
Explanation
Hemichordata is a phylum of marine deuterostome animals, generally considered the sister group of the echinoderms. They appear in the lower or middle Cambrian and include two main classes: Enteropneusta (acorn worms), and Pterobranchia.
So, the correct answer is option B.
The scientific name of gharial is
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Naja bungarus
0%
Gavialis gangeticus
0%
Hemidactylus flaviviridis
0%
None of the above
Explanation
Gharial is the fish eating crocodile, native to the northern part of the Indian Subcontinent. It's scientific name is
Gavialis gangeticus.
First vascular plant is
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Thallophyta
0%
Pteridophyta
0%
Bryophyta
0%
Spermatophyta
Explanation
Pteridophytes are also called first vascular cryptogams or spore-bearing vascular plants.
Vascular plants contain conducting system for the transport of water, minerals, and food materials like xylem and phloem tissues in plants.
They include angiosperms and gymnosperms and plants that reproduce by spores—the ferns and other so-called lower vascular plants. The pteridophytes represent the oldest vascular plants.
Thus, the correct answer is ‘Pteridophyta.’
Thigmotaxis does not occur in
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Hydra
0%
Amoeba
0%
Paramecium
0%
Ascaris
Explanation
Thigmotaxis is movement showed by an organism in the direction or away from the stimulus of touch or pressure, this may not occur in sedentary animals like Hydra
So, the correct answer is 'Hydra'
Liver fluke of cattle is
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Fasciola hepatica
0%
Fasciola gigantica
0%
Schistosoma indicum
0%
Schistosoma mansoni
Explanation
Fascioliasis is a common parasitic disease of cattle which is caused by
Fasciola hepatica.
Infected cattle produce an intense fibrous reaction within the liver. In severe chronic infestations, dairy cows show reduced milk yields and poor fertility together with excessive weight loss. So the correct answer is 'Fasciola hepatica'.
Pollen basket occurs in honey bee on
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Prothoracic leg
0%
Mesothoracic leg
0%
Metathoracic leg
0%
Union of thorax and abdomen
Explanation
The pollen basket or corbicula is
a polished cavity surrounded by a fringe of hairs,
on the outside of the tibia on the hind legs
of the bees.
This structure is used by the bees to collect the pollen and harvest it till the return to the hives.
Each leg has a pollen brush made up of branched hair or tarsomeres.
T
he metathoracic legs have a pollen press located between the tibia and the first tarsomere.
After a series of intricate manoeuvres the bee manages to transfer the pollen from the tarsomeres to the pollen basket, located on the outer surface of the tibia
So, the correct answer is option C.
Select incorrect pair from the following.
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Porifera - Choanocytes
0%
Coelenterata - Nematocysts
0%
Annelida - Segmentation
0%
Monera - Eukaryote
Explanation
Choanocytes are
distinctive cells line the interior body walls of sponges. These cells have a central flagellum, i.e., surrounded by a collar of microvilli.
The primary function of choanocytes is to assist with
circulation
.
Nematocysts
are specialized stinging cells specific to c
oelenterates
that act as organs of offence and
defense.
The annelids, which includes leeches and earthworm, are segmented animals.
All the organisms of Monera kingdom are
prokaryotes and not Eukaryotes
. They
are single-celled organisms that lack membrane-bound organelles and have a single chromosome containing all their DNA. Hence, option D is correct.
Which of the following occupies the highest level in the hierarchy of organisation in multicellular organisms?
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Organ
0%
Cell
0%
Tissue
0%
Organ system
Explanation
In multi-cellular organisms, there are various levels of organization within them. This ranges from the simplest to the complex ones.
While the cells are the basic unit of structure and function in living things and form the 1st level.
Similar types of cells together form a tissue that forms the 2nd level of organization.
Organs are made of up tissues and perform a specific function, thus they form the 3rd level of organization.
Many organs together form an organ system which is the highest among these is the organ system.
Hence, the correct option is D.
Identify the nematodes which have various shapes of amphids but without phasmids.
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Trichinella
and
Greeffiella
0%
Enterobius
and Ancylostoma
0%
Meath and Ancylostoma
0%
Wunchereria
and
Ascaris
Explanation
Phylum Nematoda has poorly developed sensory organs in the form of papillae, which are well defined as amphids ( in the mouth ) and plasmid ( in anus ). Amphids are innervated invagination of cuticle in nematodes. They are usually found in the anterior ( head ) region of the animal, at the base of the lips.Amphids are the principal olfactosensory organ of nematodes. Each amphid is made up of 12 sensory neurons with ciliated dendrites.
A plasmid is unicellular sensilla in the lateral tail regions of certain nematodes. They are similar but smaller than amphids. They have paired post anal chemoreceptor sensory organs. Nematodes are divided into two classes on the basis of sensory organs :
Aphasmida ( adenophora ), in which phasmids are absent and amphids are of different shapes e.g.,
Trichinella
and
Greeffiella
.
Phasmida ( Secernetea ), in which phasmids are present, and amphids are pore-like e.g.,
Ascaris lumbricoides, Enterobius vermicularis
.
Thus, the correct answer is option A.
Which of the following statements is incorrect pertaining to coackroach?
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Ostic have valves which allow the blood to pass only into the heart.
0%
Thoracic and abdominal spiracles are valvular.
0%
The wall of trachea is made with lamina propria, endothelium and taenidia.
0%
The taenidia keeps the trachea always open and prevent it from collapsing.
Explanation
Layers in the body wall of cockroach (outer to inner)
Epicuticle→Exocuticle→endocuticle→epidermis→basement membrane
Therefore, option C is incorrect and so the correct answer is option C.
Which among the following are fat secreting cells present in the haemocoel of cockroach?
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Trophocytes
0%
Urate cells
0%
Mycetocytes
0%
Oenocytes
Explanation
Trophocytes, urate cells, mycetocytes and oenocytes are the four types of cells present in fat bodies. The most abundant cells are trophocytes that store food in forms of fat, glycogen and proteins. The little trophocytes with relatively less cytoplasm are present in hemolymph of cockroach. Mycetocytes serve in synthesis of some amino acids and proteins with help of symbiotic bacteria. Oenocytes serve in metabolic activities during ecdysis. Urate cells serve to absorb nitrogenous waste from body cavity and to convert them into less harmful uric acid
So, the correct answer is '
Trophocytes'
Which of the following is a flightless bird?
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Aptenodytes
0%
Passer
0%
Corvus
0%
Pavo cristatus
Explanation
Passer
is a genus of sparrows.
Corvus
refers to the crows and ravens.
Pavo cristatus
is the Indian peafowl or blue peafowl.
The genus
Aptenodytes
contains two extant species of penguins as the Emperor and King penguins.
Of all these options, penguins are flightless birds.
The given animal belongs to which of the following phyla?
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0%
Porifera
0%
Aschelminthes
0%
Annelida
0%
Arthropoda
Explanation
Centipede is an organism which belongs to Arthropoda.
These organisms have elongated
dorso-ventrally flattened
and segmented body. The body is divisible into head and trunk. There are many pairs of appendages on the trunk.
Thus, the correct answer is option D.
The group that includes vascular plants is _________.
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Thallophyta
0%
Bryophyta
0%
Pteridophyta
0%
Both B and C
Explanation
Pteridophytes are the earliest plants with vascular properties in the plant kingdom. Vascular plants are those plants that have xylem and phloem.
Thallophytes and bryophytes lack vascular system.
Hence, the correct option is C.
Which is an ectotherm/poikilothermic animal?
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Lizard
0%
Pigeon
0%
Rabbit
0%
Camel
Explanation
Poikilothermic animals are those whose internal temperature varies according to the surroundings. Amphibians and Reptiles are ectotherms. Lizard is a reptile. hence, option A is correct.
Currently bacteria are included in
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Thallophyta
0%
Mycota
0%
Monera
0%
Protista
Explanation
The three-domain system of taxonomy was introduced by Carl Woese in 1977, According to this system, bacteria are included in Monera. Monera includes bacteria. These are prokaryotic unicellular bacteria without membrane-bound organelles. They also lack a true nucleus. Examples of bacteria include
E. coli
.
Thus, the correct answer is 'Monera.'
In Whittaker's five kingdom classification, non-nucleated, unicellular organisms
/
prokaryotes are included under:
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Plantae
0%
Monera
0%
Protista
0%
Animalia
Explanation
Whittaker proposed the five-kingdom classification system. The five kingdoms include Monera, Protista, Fungi, Plantae and Animalia. Monera includes prokaryotic, non-nucleated, unicellular organisms. They have a cell wall, have no membrane-bound organelles or true nucleus.
Thus, the correct answer is 'Monera.'
Cyanophyceae (blue-green algae) belongs to:
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Plantae
0%
Protista
0%
Monera
0%
Metaphyta
Explanation
Blue-green algae also called cyanobacteria are primitive algae. They belong to a kingdom that consists of unicellular prokaryotic organisms. These are usually green in colour due to the presence of photosynthetic pigment.
Cyanophyceae belongs to the Monera kingdom which includes unicellular prokaryotic organisms as they
are considered to be more closely related to bacteria.
Monerans lack membrane-bound organelles like mitochondria, endoplasimic reticulum etc.
They also lack a true nucleus. Instead, they have nucleoid, genetic material without a nuclear envelope.
Thus, the correct answer is 'Monera.'
Which of the following is not a moneran?
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Blue-green algae
0%
Diatom
0%
Archaebacteria
0%
Eubacteria
Explanation
Kingdom Monera includes prokaryotes. They lack a true nucleus. Monerans include archaebacteria, eubacteria, blue-green algae, etc.
Diatoms are unicellular and eukaryotic organisms. They are under kingdom Protista.
Thus, the correct answer is option B.
Ascaris
has ........... number of lips.
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Four
0%
Three
0%
Two
0%
One
Explanation
Ascaris is a large intestinal roundworm. It superficially resembles the
common earthworms found in the soil. Female worms can be as long as 20-35
cms, and males tend to be smaller, no larger than 30 cms. They can be anywhere
from 2-6 mm wide. Mature worms are cylindrical, creamy white or light brown.
They tend to have tapered ends.
The worms have a thick cuticle, 3 lips at its head, small teeth, and its own
digestive tract.
So, the correct answer is 'Three
'.
In male
Ascaris
, anus is
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Absent
0%
Replaced by gonopore
0%
Replaced by cloaca
0%
None of the above
Explanation
The tail is straight in female Ascaris and carries a transverse anus and a chemoreceptor called amphid between the anus and the tip of the tail. In the male the tail is curved and anus is replaced by cloaca from which two equal chitinous spicules or penial setae project out. In male two rows of preanal papillae and single and double postanal papillae are present.
So, the correct answer is 'Replaced by cloaca'.
Which of the following is the location of anus in
Ascaris
?
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Tip of the tail
0%
Infront of the posterior end
0%
Just near the excretory pore
0%
In the middle of body
Explanation
From the image it is clear that anus is present infront of the posterior end.
So, the correct answer is 'Infront of the posterior end'.
Ascaris$$/$$Nemathelminthes possesses body cavity called:
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Coelom
0%
Pseudocoelom
0%
Haemocoel
0%
Coelenteron
Explanation
Pseudocoelom is the characteristic body cavity of roundworms (Ascaris/Nemathelminthes). It is filled with protein-rich pseudocoelomic fluid and carries five giant mesenchyme cells, known as pseudocoelomocytes that occupy fixed positions in the anterior third of the body. Pseudocoelomic fluid is composed of about 93% water and substances such as protein, glucose, non-protein nitrogenous substances, sodium chloride, and phosphate.
So, the correct answer is 'Psedocoelom'.
Which is not included under schizocoelomata
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0%
Annelida
0%
Arthropoda
0%
Nematoda
0%
Mollusca
Explanation
Option 'c' is correct
Nematoda is not included under schizocoelomata
because schizocoelomata are invertebrate animals
that possess a schizowd, a coelcm formed
through we spilling of to mesoduryal mass,
the meddle germ layers is embryonic development
It is found is Annelida, Athropoda and
Mollusca whenever nematode is not consider
to be a three coelom as they are not lined by
a tissue.
Lips of
Ascaris
are
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Smooth
0%
Rough
0%
Denticulate
0%
Spiny
Explanation
Denticulate means small teeth or tooth-like projections. Their mouth has three lips with numerous small teeth.
So, the correct answer is 'Denticulate'.
Which pair of animals are similar to features mentioned?
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Pteropus and Ornithorhyncus- Viviparity
0%
Garden Lizard and Crocodile-Three chambered heart
0%
Ascaris and Ancylostoma- Metameric segmentation
0%
Sea Horse and Flying Fish- Cold blooded
Size of common roundworm or
Ascaris lumbricoides
is?
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0%
15-30 cm in male and $$20-40$$cm in female
0%
$$10-15$$cm in male and $$15-25$$cm in female
0%
$$5-10$$cm in male and $$10-15$$cm in female
0%
$$3-5$$cm in male and $$7-10$$cm in female
Explanation
The roundworm Ascaris lumbricoides is the largest intestinal nematode infecting humans, with females averaging 30 cm in length (ranging from 20-49 cm) and measuring 3-6 mm in diameter. Males are smaller, ranging from 15-30 cm in length and 2-4 mm in diameter.
So, the correct answer is '15-30 cm in male and 20−40cm in female'.
Taste receptors of
Ascaris
are
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0%
Phasmids
0%
Amphids
0%
Labial papillae
0%
Both B and C
Explanation
The sense organs of Ascaris are as follows: Labial papillae are gustoreceptors (or taste-receptors) and are present on three lips. Cervical papillae are tactile organs. Anal papillae are situated below the posterior end of male. There are 5 pairs of postanal genital papillae and 50 pairs of preanal papillae. They are tactile in function and help in copulation. Amphids, present on each lateroventral lip, are chemoreceptors. Phasmids are chemoreceptors that open one on either side of tail of female.
So, the correct answer is 'Labial papillae'.
Animals that rely on heat from the environment rather than of metabolism, to raise their body temperature are called:
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Ectothermic
0%
Homoeothermic
0%
Endothermic
0%
Both B and C
Explanation
Animals that rely on heat from the environment rather than metabolism, to raise their body temperature are called ectothermic or poikilotherms Eg. Pisces. reptiles, amphibians.
So, the correct answer is '
Ectothermic'
Female
Ascaris
is differentiated from male by having
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Cloaca
0%
Penial setae
0%
Shorter size
0%
Straight posterior end
Explanation
Ascaris is an animal genus comprised of intestinal roundworms. Ascaris lumbricoides lives in humans, and ascaris suum in pigs. Although the male and female worms look similar, there are several characteristics that distinguish the two sexes, both externally and internally. Externally, the sexes can be identified by size and the presence or absence of bodily structures. Internally, they can be distinguished by their reproductive organs. Females are usually wider around and grow to be 20-40 cm long, while males are usually thinner and grow to be 15-30 cm long. Examine the posterior end of the worm. Female worms are straight while males are hooked.
So, the correct answer is 'Straight posterior end'.
Fluke occurring in human beings is
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0%
Fasciolopsis
0%
Fasciola
0%
Dugesia
0%
Echinococcus
Explanation
Fasciolopsis buski
is the largest intestinal fluke in humans. It causes a parasitic disease called fasciolopsiasis. Fasciolopsiasis is endemic in China, India, Malaysia, South-East Asia and Taiwan where pigs are raised and fed with freshwater plants. So, the correct answer is '
Fasciolopsis'.
Schistosoma
lives in human body in
Report Question
0%
Lymph nodes
0%
Urinary tract blood vessels
0%
Mesenteric and hepatic portal veins
0%
All of the above
Explanation
Schistosomiasis is an acute and chronic disease caused by blood flukes. People become infected when larval forms of the parasite released by freshwater snails and penetrate the skin during contact with infested water. Transmission occurs when people suffering from schistosomiasis contaminate freshwater sources with their excreta containing parasite eggs, which hatch in water. In the body, the larvae develop into adult schistosomes. Adult worms live in the blood vessels, lymph nodes, mesentric and hepatic portal veins etc. depending on the infected species. So, option D is correct.
Pigs pick up Tapeworm infection because they are
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0%
Coprozoic
0%
Coprophagus
0%
Carnivorous
0%
Scavengers
Explanation
Pigs are called as coprozoic because they live in dung or mud. Most of the tapeworms are present in dung or mud because these tapeworm larva and eggs are present in infected animal stool. That is the reason pigs pick up tapeworm infections. So, option A is correct.
Primary host of
Echinococcus granulosus
is
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0%
Sheep or Goat
0%
Dog
0%
Human beings
0%
Pig
Explanation
The adult
Echinococcus granulosus
resides in the small bowel of the definitive hosts, dogs or other canids. The released eggs are passed in the feces. After ingestion by a suitable intermediate host (such as sheep, goat, swine, cattle, horses, camel) the egg hatches in the small bowel and releases an oncosphere that penetrates the intestinal wall and migrates through the circulatory system into various organs, especially the liver and lungs. By this life cycle, we are sure that the primary host is a dog and the intermediate hosts are sheep or goat. Humans are also infected through infected dogs. So, option B is correct.
Infection in which capsules pass out of the body through faeces and urine is
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0%
Cysticereosis
0%
Schistosomiasis
0%
Taeniasis
0%
Both B and C
Explanation
Schistosomiasis is an acute and chronic disease caused by blood flukes. People become infected when larval forms of the parasite released by freshwater snails and penetrate the skin during contact with infested water. Transmission occurs when people suffering from schistosomiasis contaminate freshwater sources with their excreta containing parasite eggs, which hatch in water. In the body, the larvae develop into adult schistosomes. Adult worms live in the blood vessels where the females release eggs. Some of the eggs are passed out of the body in the feces or urine to continue the parasite’s life cycle. Others become trapped in body tissues, causing immune reactions and progressive damage to organs. So, option B is correct.
In case of human beings, hydatid cysts occur over
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0%
Stomach
0%
Liver
0%
Lungs
0%
Both B and C
Explanation
Human echinococcosis is a parasitic disease caused by tapeworms of the genus
Echinococcus
. Two most important forms of the disease in humans are cystic echinococcosis (hydatidosis) and alveolar echinococcosis. Human infection with E. granulosus leads to the development of one or more hydatid cysts located most often in the liver and lungs and less frequently in the bones, kidneys, spleen, muscles, central nervous system and eyes. Abdominal pain, nausea, and vomiting are commonly seen when hydatids occur in the liver. If the lung is affected, clinical signs include a chronic cough, chest pain and shortness of breath. Other signs depend on the location of the hydatid cysts and the pressure exerted on the surrounding tissues. So, option D is correct.
Beef Tapeworm is
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0%
Taenia solium
0%
Taenia saginata
0%
Hymenolepsi nana
0%
Dipylidium caninum
Explanation
Taenia saginata
is commonly known as the beef tapeworm. It is an intestinal parasite in humans causing taeniasis which is a type of helminthiasis and cysticercosis in cattle. Cattle are the intermediate hosts where larval development occurs, while humans are definitive hosts contains the adult worms. So, option B is correct.
Number of proglottides present in
Echinococcus granulosus
is
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0%
3-4
0%
10-15
0%
25-30
0%
250-300
Explanation
Adult
E. granulosus
have a scolex with only three attached segments, which are immature proglottid, mature proglottid, and gravid proglottid. The scolex has four lateral suckers and the rostellum is non-retractable and armed with hooks. So, option A is correct.
Number of gravid proglottids expelled out at one time is around_________.
Report Question
0%
45
0%
510
0%
1020
0%
2040
Explanation
Option 'A' is correct.
Number of gravid proglottids expelled out at one time is around 45. The gravid proglottids are expelled passively, is chains of $$5- 6$$ at a time. These are present at the end of strobila and contain fully developed uterus full of eggs.
Fascioliasis is
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0%
Liver rot of sheep
0%
Cirrhosis of humans
0%
Liver rot of cattle
0%
Cirrhosis of pig
Explanation
Fascioliasis is a parasitic infection caused by
Fasciola hepatica
which is also known as the liver rot of sheep or the sheep liver fluke. It is called because they puncture the liver's surface and eat their way through its tissues until they reach the bile ducts. This invasion kills the liver's cells and causes intense internal bleeding and a swollen liver. So, the correct answer is 'Liver rot of sheep'.
Chinese or Oriental Liver Fluke is
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0%
Clonorchis sinensis
0%
Schistosoma japonicum
0%
Fasciola gigantica
0%
Both B and C
Explanation
Clonorchis sinensis
is commonly called as chinese liver fluke, comes from its abundance in these areas.
Schistosoma japonicum
is commonly called as blood fluke.
Fasciola gigantica
is commonly called as giant liver fluke. So, the correct answer is
'Clonorchis sinensis'.
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Practice Class 9 Biology Quiz Questions and Answers
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