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CBSE Questions for Class 9 Biology Diversity In Living Organisms Quiz 8 - MCQExams.com
CBSE
Class 9 Biology
Diversity In Living Organisms
Quiz 8
Human infection of blood fluke occurs through
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0%
Metacercaria
0%
Miracidium
0%
Capsule
0%
Cercaria
Explanation
Schistosomes have a complex life cycle in which cercariae free-living in fresh water can penetrate the healthy human skin. The head of the cercaria transforms into an endoparasitic larva, the schistomule. The schistomules pass several days in the skin then enter the venous circulation and eventually migrate to the lungs. They then travel through the circulatory system to the hepatoportal circulation where they mature into adult worms and mate. So, option D is correct.
In
Schistosoma
, gynaecophoral canal occurs in
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0%
Male for holding female
0%
Male for holding eggs
0%
Female for holding cage
0%
Female for holding male
Explanation
Adult males have deep grooves called gynecophoral canals in which adult females typically lie. Unlike other trematodes, the schistosomes are dioecious i.e, the sexes are separate. The two sexes display a strong degree of sexual dimorphism and the male is considerably larger than the female. The male surrounds the female and encloses her within his gynacophoric canal for the entire adult lives of the worms. So, option A is correct.
Intestinal fluke is
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0%
Fasciola indica
0%
Fasciolopsis buski
0%
Opisthorchis sinensis
0%
Schistosoma japonicum
Explanation
Fasciolopsis buski
is called as intestinal fluke. It is a parasitic fluke that lives in small intestine causing fasciolopsiasis. They feed on intestinal contents of the host and remains in the small intestine until it dies or is removed. So the correct answer is '
Fasiolopsis buski
'.
Cercaria of blood fluke pass into human body through
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0%
Ingestion of food
0%
Drinking of contaminated water
0%
Direct penetration through skin
0%
Both B and C
Explanation
People become infected when larval forms of the parasite, which are released by freshwater snails 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. Drinking of contaminated water also causes the disease. So, option D is correct.
The alternate host of
Schistosoma
is
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0%
Snail
0%
Pig
0%
Sheep and Goat
0%
Fish
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. Some of the eggs are passed out of the body in the feces or urine to continue the parasite’s lifecycle. Others become trapped in body tissues, causing immune reactions and progressive damage to organs. Larvae must then pass through an intermediate snail host, before the next larval stage of the parasite emerges that can infect a new mammalian host by directly penetrating the skin. So, option A is correct.
Miracidium gives rise to
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0%
Sporocyst after entering snail
0%
Sporocyst in contact with aquatic vegetation
0%
Redia after entering snail
0%
Redia in contact with aquatic vegetation
Explanation
Fasciola
parasites develop into adult flukes in the bile ducts of infected mammals, which pass immature Fasciola eggs in their faeces. After several weeks the eggs hatch producing a parasite form known as the miracidium, which then infects a snail host. The miracidium is a free-swimming ciliated larva. Under optimal conditions, miracidia develop into sporocysts, radiae and cercariae. Cercariae are then shed in the water around the snail. The cercariae lose their tails when they encyst as metacercariae on water plants. In contrast to cercariae, metacercariae have a hard outer cyst wall and can survive for prolonged periods in wet environments.
Schistosoma
is a
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0%
Hermaphrodite but protandrous
0%
Hermaphrodite but protogynous
0%
Unisexual
0%
Hermaphordite with self fertilization
Explanation
Unlike other trematodes the schistosomes are dioecious i.e, the sexes are separate which means they are unisexual. The two sexes display a strong degree of sexual dimorphism. The male is considerably larger than the female. The male surrounds the female and encloses her within his gynacophoric canal for the entire adult lives of the worms. So, the correct answer is 'Unisexual'.
Liver fluke living in bile ducts feeds on
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0%
Bile
0%
Blood and lymph
0%
Epithelial cells
0%
All the above
Explanation
Fascioliasis is a parasitic infection caused by
Fasciola hepatica
which is also known as the common liver fluke or the sheep liver fluke. It infects the people eating raw watercress or other water plants contaminated with immature parasite larvae. The immature larval flukes migrate through the intestinal wall, the abdominal cavity and the liver tissue into the bile ducts, where they develop into mature adult flukes by feeding on blood, epithelial cells, lymph and blood which produce eggs.
Liver Fluke has
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0%
Absorptive nutrition
0%
Saprozoic nutrition
0%
Holozoic nutrition
0%
All of the above
Explanation
Holozoic nutrition is a method of nutrition that involves the ingestion of liquid or solid organic material, digestion, absorption and assimilation of it to utilize it. It includes taking in the complex substances and converting them into simpler forms. Same nutrition type occurs in the liver fluke. So, option C is correct.
Fasciola hepatica
is:
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0%
Ectoparasite
0%
Monogenetic endoparasite
0%
Digenetic endoparasite
0%
Incidental parasite
Explanation
Fasciola hepatica
is called as digenetic because its life cycle is completed in two hosts (sheep and invertebrate host).
It is endoparasite because it lives inside the bile passage of sheep.
So the correct answer is option C- 'digenetic endoparasite'.
Sheep pick up infection of liver fluke from
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0%
Redia
0%
Cercaria
0%
Metacercaria
0%
Capsule
Explanation
The cercariae are released from the snail and encyst as metacercariae on aquatic vegetation. Sheeps acquire the infection by eating vegetation containing metacercariae. After ingestion, the metacercariae develop into adult flukes in bile ducts. So the correct answer is 'metacercaria'.
Liver Fluke resides inside
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0%
Liver
0%
Bile ducts
0%
Liver and duodenum
0%
Both A and B
Explanation
Grazing animals ingest the cysts which release immature flukes in the small intestine. The young flukes penetrate the intestinal wall, make their way to the liver and then migrate through the liver tissue for 6–7 weeks before entering the bile ducts to become adults. Adult fluke in bile ducts produce eggs that flow in the bile to the intestines and are passed out in the host’s feces. So, option C is correct.
In
Fasciola hepatica
, germination of capsule produces
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0%
Miracidium
0%
Sporocyst
0%
Redia
0%
Cercaria
Explanation
Fasciola
parasites develop into adult flukes in the bile ducts of infected mammals, which pass immature
Fasciola
eggs in their feces. After several weeks the eggs hatch producing a parasite form known as the miracidium, which then infects a snail host. Under optimal conditions, the development process in the snail may be completed in 5 to 7 weeks cercariae are then shed in the water around the snail. The cercariae lose their tails when they encyst as metacercariae on water plants. Mammals acquire the infection by eating vegetation containing metacercariae. Humans can become infected by ingesting metacercariae containing freshwater plants, especially watercress. So, option A is correct.
Miracidium of liver fluke is
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0%
Free-swimming
0%
Creeping
0%
Non-motile
0%
Free-floating
Explanation
Fasciola
parasites develop into adult flukes in the bile ducts of infected mammals, which pass immature
Fasciola
eggs in their feces. After several weeks the eggs hatch producing a parasite form known as the miracidium, which then infects a snail host. The miracidium is a free-swimming ciliated larva. Under optimal conditions, the development process in the snail may be completed in 5 to 7 weeks, cercariae are then shed in the water around the snail. The cercariae lose their tails when they encyst as metacercariae on water plants. In contrast to cercariae, metacercariae have a hard outer cyst wall and can survive for prolonged periods in wet environments. So, option A is correct.
The animal having parenchyma in space between body wall and gut is_______________.
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0%
Echinococcus
0%
Echinodiscus
0%
Entrobium
0%
Eunice
Explanation
Echinococcus are ponasitic species of cyclophyllid tapeworms. They are triploblastic and have three layers. These have parenchyma is space between body wall and gut. The infection will echinococcus result in hydatid disease.
Intermediate host of
Schistosoma
is
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0%
Sheep
0%
Snail
0%
Mosquito
0%
Pig
Explanation
Schistosoma is a genus of trematodes which are commonly known as blood flukes. The life cycle of schistosomes is characterized by two hosts. Humans as definitive hosts where the parasite undergoes sexual reproduction and snails as intermediate hosts where a series of asexual reproductive takes place. So the correct answer is 'snail'.
The cercarial stage of liverfluke is produced by
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0%
Sexual reproduction
0%
Asexual multiplication
0%
Binary fission
0%
Parthenogenesis
Explanation
Inside the body of snail, the miracidium hatches from the egg and parasitically grows inside the snail. Cercaria is the larva form of liver fluke which is formed from miracidium after few developmental stages. Due to asexual reproduction, multiplication of cercaria occurs from one miracidium. Asexual reproduction is a type of reproduction by which offspring arise from a single organism. So the correct answer is 'asexual multiplication'.
Flatworms differ from roundworms in possessing
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0%
Solid mesoderm
0%
Bilateral symmetry
0%
Metamorphosis
0%
Triploblastic body
Explanation
Roundworms are pseudocoelomate which means they have a body cavity which is not completely surrounded by mesoderm. The cavity is lined with mesoderm only on the ectodermal side. Thus, although organs are held in place loosely, they are not as well organized as in a coelomate.
So, roundworms
do
not have solid mesoderm. Flatworms have solid mesoderm, ectoderm and endoderm. So the correct answer is 'Solid mesoderm'.
Which of the following can show self fertilization?
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0%
Earthworm
0%
Liver fluke
0%
Fish
0%
Roundworm
Explanation
Liver fluke or
Fasciola hepatica
adults are hermaphroditic i.e, capable of both cross-fertilization and self-fertilization. During self-fertilization, sperms from the same fluke enter the uterus through the female genital pore to fertilize the eggs in the distal part of the oviduct. So, the correct answer is 'Liver fluke'.
Excretory organs of flatworms are
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0%
Malpighian tubules
0%
Nephridia
0%
Protonephridia
0%
Nephron
Explanation
Protonephridia are present in flatworms and they are the excretory organs of flatworms.
Protonephridia consists of many flame cells. Flame cells are functionally similar with kidney.
Their function is to regulate the osmotic pressure and maintain its ionic balance.
So, the correct answer is option C.
Which one of the following is an actively swimming free-living and non-feeding stage of liver fluke?
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0%
Sporocyst
0%
Redia
0%
Cercaria
0%
Metacercaria
Explanation
Cercaria: a free-swimming larval stage in which a parasitic fluke passes from an intermediate host (typically a snail) to another intermediate host or to the final vertebrate host.
Sporocyst: a parasitic fluke in the initial stage of infection in a snail host, developed from a miracidium.
Redia. : a larva produced within the sporocyst of many trematodes that produces another generation of larvae like itself or develops into a cercaria.
metacercaria. : a tailless encysted late larva of a digenetic trematode that is usually the form which is infective for the definitive host.
So, the correct answer is 'Cercaria'.
Choose the correct combinations:
a. Turbellaria -Mostly free-living flatworms with -
Convoluta mucu
s forming rhabdites in body wall
b. Trematoda - Commonly called flukes with two suckers
c. Cestoda - Ecto-and endoparasites, body segmented
Echinococcus
d. Phasmidia - Amphids forming chemoreceptor function -
Trichuris
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0%
(b) and (c)
0%
(a) and (b)
0%
(a), (c) and (d)
0%
(a), (b) and (d)
Explanation
Trematoda is a clade within the phylum Platyhelminthes. It includes two groups of parasitic flatworms, known as flukes. Generally, trematodes are endoparasites, meaning that they attach to the internal tissue of the host such as the digestive tract or the liver. Most are dorso-ventrally flattened and typically have two suckers, an oral sucker around the mouth for feeding and a ventral sucker, which they use to attach to the host.
The Turbellaria are one of the traditional sub-divisions of the phylum Platyhelminthes, are free-living. Turbellaria lives in freshwater, seawater, and wet terrestrial habitats. Rhabdites are rod-shaped secretory products characteristic of the Turbellaria. InAlloioplana, Monocelis andPolychoerus ( Turbellaria) the rhabdites are the only, or most common, a secretory product released on the ventral locomotor sole and therefore they are thought to form the viscous mucus used in locomotion by ciliary gliding.
So, the correct answer is '(a) and (b)'.
Gut is found in all but one of the following taxonomic groups of Platyhelminthes is
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0%
Digenea
0%
Cestoda
0%
Polycladida
0%
Monogenea
Explanation
Cestoda is a class of parasitic worms in the flatworm phylum. Echinococcus Rudolphi is a small endoparasitic flatworm belonging to the Class Cestoda. It is a ‘true tapeworm’ (Subclass Eucestoda) and as such exhibits the features that characterize this group. It has no gut and all metabolic interchange takes place across the syncytial outer covering, the tegument.
So, the correct answer is 'Cestoda'.
Which one of the following animal is triploblastic?
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0%
Sponges
0%
Jellyfish
0%
Hydra
0%
Flatworms
Explanation
Flatworms are called as triploblastic as they are composed of three fundamental cell layers which are mesoderm, ectoderm and endoderm.
So the correct answer is 'flatworms'.
Pupa of a butterfly is termed as
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0%
Nymph
0%
Naiad
0%
Imago
0%
Chrysalis
Explanation
D. Chrysalis
EXPLANATION: The pupa of butterfly is called chrysalis. The pupa may be suspended under a branch, hidden in leaves or buried underground depending on the species. Time duration of the pupal stage also varies according to the species
The passage of eggs in uterus is lubricated by the secretion from mehlis glands in
Report Question
0%
Liver fluke
0%
Ascaris
0%
Platypus
0%
Kangaroo
Explanation
Mehlis gland is primarily present surrounding the ootype of all platyhelminthes which includes liver fluke and it is a part of the female reproductive organ. As a part of female reproductive organ it has an important role in guiding the ova out towards the passage ending in the uterus by its secretion which lubricates the passage of uterus through which ova move. So the correct answer is 'liver fluke'.
Larva of housefly is known as
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0%
Maggot
0%
Grub
0%
Caterpillar
0%
Naiad
Explanation
A. Maggot
EXPLANATION: The larva of housefly is known as maggot. Maggots are legless. White insects are fed from the egg-laying site for three to five days and during this period the maggots molt several times.
Worker termites are
Report Question
0%
Wingless
0%
Sterile
0%
Blind
0%
All of the above
Explanation
Workers are sterile, wingless and blind males and females. Their cuticle is unpigmented and not hardened, therefore the animals are confined to a dark and moist environment. Workers build the nest and galleries, they fetch food, care for the brood and feed reproductives and soldiers. Soldier termites are both male and female. They are sterile, wingless, and blind termites. Their role in the colony is to defend the colony from unwanted intruders by using their powerful jaws.
Hence, the correct answer is (D)
Which of the following is a sanguivorous?
Report Question
0%
Cimex
0%
Apis
0%
Musca
0%
Blatta
Explanation
A.
Cimex
EXPLANATION:
Cimex
is a genus of insects under the family of Cimicidae.
Cimex
is a sanguivorous, which is a blood sucking animal. Some other examples of sanguivorous animals are leech and female mosquito.
The period between the 2 moults of insects is
Report Question
0%
Stadium
0%
Instar
0%
Incubation
0%
None of the above.
Explanation
A. Stadium
EXPLANATION: The period between the 2 moults of insects is called stadium. Instar is the shape and size of insect between two successive moultings. The first stadium is that time between the hatching and the first moult.
Eggs of Pediculus/human louse are _____________.
Report Question
0%
Nits
0%
Tumblers
0%
Naiads
0%
Instars.
Explanation
Body lice live in the seams of clothing, generally where it touches the skin, and only contact the body to feed, usually holding on to the clothing while they do this. However, sometimes they will move to the body itself. The eggs of lice are called nits. They are oval white cylinders (1/16 inch long).
Hence, the correct answer is (A)
Phylum Annelida includes over
Report Question
0%
15,000 species
0%
9,000 species
0%
60,000 species
0%
9,00,000 species
Explanation
Phylum Annelida involve ringworms or segmented worms found in marine water, fresh water and in moist terrestrial habitat and include over 9000 species and their body has distinct segments known as metamers.
So, the correct option is '9000 species'.
Hence, the correct option is (B)
Male
Anopheles
differs from female in having
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0%
Larger wings
0%
Spotted wings
0%
Larger antennae
0%
Brush like antennae
Explanation
D. Brush like antennae
EXPLANATION: Male Anopheles has very hairy and fuzzy antennae. Female Anopheles have less hairy brush like antennae. The female mosquito is more dangerous than the male one as they are sanguivores.
Which one of the following life cycle stage of liver fluke is infective to the intermediate host?
Report Question
0%
Metacercaria
0%
Miracidia
0%
Sporocyst
0%
Cercaria
Explanation
Miracedium is the larval stage of liver fluke which is released into fresh water when eggs are hatched. These miracedium infects the snail present in that fresh water (intermediate host). So, the correct answer is 'Miracidia'.
Barnacles feed on which of the following?
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0%
Other crustaceans
0%
Worms
0%
Microorganisms
0%
All types of animals
Explanation
C. Microorganisms
EXPLANATION: Barnacles eat microorganisms, like tritus, plankton, etc. Barnacles are sessile. The main predators of barnacles are whelks-snails.
Squilla
is a
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0%
Arachnid
0%
Crustacean
0%
Chilopod
0%
Insect
Explanation
a) Arachnid is a wingless carnivorous arthropod. For example, spiders and scorpions.
b) Crustacean has hard exoskeletons with distinct body regions and no internal structures. For example, Crustacean.
c) Chilopod has one pair of legs per body segments and has more than 40 to 50 legs. for example, Centipedes.
d) Insects have a pair of antennae on top of their heads. For example, bees, ant and termites.
So, the correct answer is 'Crustacean'.
Cement glands of
Lepus
and
Balanus
open over
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0%
Antennules
0%
Antennae
0%
Maxillae
0%
Maxillules.
Catadromous fishes migrate from:
Report Question
0%
Fresh to fresh water
0%
Fresh to marine water
0%
Marine to fresh water
0%
Marine to marine water
Explanation
A. Fishes that migrate from freshwater to freshwater are called potamodromous fishes.
B. Fishes that migrate from fresh to marine water are called
catadromous fishes.
C. Fishes that migrate from marine to freshwater are called anadromous fishes.
D. Fishes that migrate from marine to marine water are called oceanodromous fishes.
So, the correct answer is option B.
Potamodromous fishes migrate from
Report Question
0%
Fresh to fresh water
0%
Fresh to marine water
0%
Marine to fresh water
0%
Marine to marine water
Explanation
A. Fishes that migrate from freshwater to freshwater are called potamodromous fishes.
B. Fishes that migrate from fresh to marine water are called catadromous fishes.
C. Fishes that migrate from marine to fresh water are called anadromous fishes.
D. Fishes that migrate from marine to marine water are called oceanodromous fishes.
So, the correct answer is 'Fresh to fresh water'.
Which of the following is a flying fish?
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0%
Torpedo
0%
Scoliodon
0%
Anabas
0%
Exocoetus
Explanation
A.
Torpedo
is known as the electric ray as it can produce electrical shocks.
B.
Scoliodon
is known as the dogfish.
C.
Anabas
is known as climbing perch.
D.
Exocoetus
is known as flying fish. It has wings modified as fins, but they are not meant for flying. Instead, wings help them in swimming faster than other fish.
So, the correct answer is option D.
Oceanodromous fishes migrate from
Report Question
0%
Fresh to fresh water
0%
Fresh to marine water
0%
Marine to fresh water
0%
Marine to marine water
Explanation
A. Fishes that migrate from freshwater to freshwater are called potamodromous fishes.
B. Fishes that migrate from fresh to marine water are called catadromous fishes.
C. Fishes that migrate from marine to fresh water are called anadromous fishes.
D. Fishes that migrate from marine to marine water are called oceanodromous fishes.
So, the correct answer is 'Marine to marine water'.
Triops/Apus is a
Report Question
0%
Marine crustacean
0%
Fresh water crustacean
0%
Fresh water arachnid
0%
Terrestrial arachnid
Explanation
Triops also called longtail tadpole shrimp characterized with elongated segmented body belongs to taxon crustacean lives in fresh water does not live in marine.
So, the correct answer is 'Freshwater crustacean'.
Balanus
differs from
Lepus
in being
Report Question
0%
Sessile
0%
Stalked
0%
Absence of cement glands
0%
Absence of mantle
Explanation
A. Sessile
EXPLANATION:
Balanus
is a sessile organism, which lives in shells that are permanently attached to the hard substances.
Balanus
eat plankton, which are swept from the water with their fan-like feet.
Lepus
is not a sessile organisms.
Triops commonly multiplies through
Report Question
0%
Sexual reproduction
0%
Asexual reproduction
0%
Parthenogenesis
0%
All of the above
Explanation
C. Parthenogenesis
EXPLANATION:
Triops
is a genus of small crustaceans. Some species of
Triops
are considered as the living fossils. Parthenogenesis is a form of reproduction, in which an egg can develop into the embryo without being fertilized.
Triops
commonly multiplies through the process called parthenogenesis.
Haemocoel occurs in
Report Question
0%
Annelida
0%
Arthropoda
0%
Mollusca
0%
Both B and C
Explanation
D. Both B and C
Reason: the primary body cavity of most invertebrates, which contain circulatory fluid, is Known as haemocoel.
Arthropods and mollusks have an open circulatory system where the blood, flows into haemocoel and it bathes the organs directly. They have no specific blood vessels for carrying the blood. So, the correct option is D.
Dorsal and ventral fins of Anabas have _________________.
Report Question
0%
Stiff rays
0%
Soft rays
0%
Stiff rays in anterior region and soft rays in posterior region
0%
Soft rays in anterior region and stiff rays in posterior region
Explanation
In
Anabas
the
anterior portion of dorsal and ventral fin have stiff rays and in the posterior region of fin contains soft rays.
So, the correct option is C.
Which is an anadromous fish?
Report Question
0%
Hippocampus
0%
Petromyzon
0%
Exocoetus
0%
Anabas
Explanation
Fishes that migrate from marine to fresh water are called anadromous fishes.
A.
Hippocampus
is a catadromous fish.
B.
Petromyzon
is an anadromous fish.
C.
Exocoetus
is a catadromous fish.
D.
Anabas
is a catadromous fish.
So, the correct answer is
'Petromyzon'
.
Latimeria swims by means of
Report Question
0%
Flapping movement of its pectoral and pelvic fins
0%
Rotational movement of its pectoral fins
0%
Flapping movement of pectoral fins and rotational movement of pelvic fins
0%
Rotational movement of tail fin
Explanation
B. Rotational movement of its pectoral fins
EXPLANATION: Latimeria is a rare genus of fish. This genus has two extant species- West Indian Ocean coelacanth and Indonesian coelacanth. The West Indian Ocean coelacanth is a critically endangered species. Latimeria swims by rotating the pectoral fins and the paired fins are highly mobile.
New wold monkey differs from old world monkeys in
Report Question
0%
Presence of tail
0%
Absence of ischial callosities
0%
Flatter nose
0%
Both B and C
Explanation
New world monkey has:
1. The tail is prehensile.
2. Lack of ischial callosities.
3. Have a flat nose with a broad internasal septum.
So, the correct answer is 'Both B and C'.
Stenohaline fishes are
Report Question
0%
Marine fishes only
0%
Those which tolerate narrow range of salinity
0%
Those which tolerate wide range of salinity
0%
Fresh water fishes only
Explanation
B. Those which tolerate narrow range of salinity
Reason: Stenohaline organisms are such species which can only tolerate specific limits of salinities. They can not handle a high amount of changes of salt content in water and the organism's tolerance for salt content depends on the type of species it is e.g. Goldfish (survive under low salinity) and Haddock (survive under high salinity).
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Practice Class 9 Biology Quiz Questions and Answers
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