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CBSE Questions for Class 11 Medical Biology Animal Kingdom Quiz 6 - MCQExams.com
CBSE
Class 11 Medical Biology
Animal Kingdom
Quiz 6
Identify the oviparous mammal from the following.
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Kangaroo
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Duck-billed platypus
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Whale
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Rabbit
Explanation
Mammals are mainly viviparous. But, there are some exceptions, such as the duck-billed platypus, which is a semiaquatic egg-laying mammal. It is endemic to the Australian region. Another example of an oviparous mammal is the spiny ant-eater.
So, the correct option is B.
Mammals with scaly coat on body
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Elephant
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Human
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Pangolin
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All of the above
Explanation
Pangolins
, also known as
scaly
anteaters because they possess
hard, plate-like scales. Their
scales are made of keratin and
cover the entire body from head to tip of the tail.
Therefore, the correct answer is option C.
Cloacal aperture is found in
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Prototheria
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Polychaeta
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Primates
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Protozoa
Explanation
The subclass Prototheria contains the egg-laying mammals, which are the most ancestral forms in the class Mammalia. They have a special feature, which made them different from other mammals and called as 'monotreme' which means single opening, derived from the fact that their urinary, defecatory and reproductive systems all open into a single duct, called as the cloaca. Therefore cloacal aperture is found in Prototheria. Hence, option A is correct.
External ear is found in:
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Reptiles
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Mammals
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Amphibians
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Pisces
Explanation
The external ear is the key characteristic of mammals, except for some aquatic mammals like whales.
Hence, option B is correct.
Which of the following is 'man of forest'?
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Orangutan
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Gibbon
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Baboon
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Gorilla
Explanation
Orangutan
is the largest arboreal mammal and spending most of their time in trees.
They have l
ong, powerful arms and grasping hands and feet allow them to move through the branches. Hence, option A is correct.
Australian lung fish is
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Scoliodon
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Lepidosiren
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Protopterus
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Neoceratodus
Explanation
Neoceratodus
is an Australian lung fish. As they possess lung like organ called as lung fish.
Neoceratodus
has remained virtually unchanged for well over 100 million years, making it a living fossil
and one of the oldest living vertebrate genera on the planet. Hence, option D is the correct answer.
Armoured fishes belongs to class
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Placodermi
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Osteichytes
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Elasmobranchii
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Chondrichthyes
Explanation
Placodermi is an extinct class of armoured fish. They are
known from fossils dating from the late Silurian to the end of the Devonian.
Their head and thorax were covered by articulated armoured plates and t
he other parts of their bodies had no such protection, or were protected only by scales.
Hence, option A is correct.
Which characteristics are found only in mammals?
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Pinna, teeth
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Hair, oviparity
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Mammary gland, teeth
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Hair, mammary gland
Explanation
The key characteristic of mammals is the adaptation of skin glands, such as hair follicles and mammary glands. Bodies of mammals are typically covered with hair which has no structural homology in other vertebrates. Mammary glands secrete milk that are used for the nourishment of the young one during their postnatal period of rapid growth.
Hence, option D is correct.
Spiny anteater is
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Indian bird
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Australian mammal
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Australian bird
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Australian reptile
Explanation
Echidnas also called as spiny anteaters belong to the family of Tachyglossidae in the monotreme order of egg-laying mammals. They are the primitive mammal and live in Australia region due to geographical isolation. Hence, option B is correct.
A particular echolocation sensory system is found in some mammals belonging to the order of
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Chiroptera
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Insectivora
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Primates
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Ungulata
Explanation
Bats of order Chiroptera
are one of the few mammals that can use sound to navigate, known as echolocation.
Bats possess biosonar or radar system that use echolocation to navigate and find food in the dark. The echo bounces off the object and returns to the bat's ears. Bats receive the echoes and figure out, where the object is.
The scientific name of kangaroo is:
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Pteropus
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Felis
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Macropus
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Chiroptera
Explanation
Kangaroo's scientific name is
Macropus
. It is a marsupial from the family
Macropodidae
. They are endemic to Australia.
Like most marsupials
, female kangaroos have a pouch
called a marsupium in which young ones complete post-natal
development and thus belong to marsupial.
So, option C is correct.
Which character establishes that elephant is an inhabitant of warm climate?
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Almost hairless skin
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Small eyes
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Large body
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Thick legs
Explanation
Elephants are large mammals and possess mammalian characters like placenta, skin with hairs, mammary gland, muscular diaphragm. They possess scattered body hairs that help them to dissipate heat. The sparseness of the hair on the skin also establishes their warm habitations. Thus, the correct answer is option A.
Sea lion is a
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Amphibian
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Mammal
0%
Reptilian
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Fish
Explanation
Sea lions (
Otariinae
) are the mammals as they characterized by external ear flaps, mammary glands, placenta
. Hence, option B is the correct answer.
The purpose of warm-bloodedness in mammals is:
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Maximum evaporation from body surface
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Increased metabolism
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Keep body temperature constant in spite of change in climate temperature
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Continuous production of energy for physiology
Explanation
Homeothermy or warm-bloodedness is
the ability to maintain a constant internal
temperature
(about $$37^0$$ C). This helps mammals to regulate their metabolism and keep it constant at climatic change.
So, option C is correct.
Which of the following animals does not have placenta?
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Bat
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Platypus
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Kangaroo
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Whale
Explanation
Platypus,
also known as the
duck-billed platypus
is a semi-aquatic
egg-laying primitive mammal. They are devoid of the placenta and thus lay eggs. They are found only in the Australian region due to geographical isolation.
Hence, option B is correct.
Mammals with true placenta are called as
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Prototheria
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Theria
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Metatheria
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Eutheria
Explanation
Eutheria
are a group of mammals consisting of placental mammals. The placental mammals include such diverse forms as whales, elephants, shrews, and humans. They all bear live young, which are nourished before birth in the mother's uterus through a specialized embryonic organ attached to the uterus wall, the placenta. Hence, option D is correct.
The primitive characters of duck billed platypus suggests, that
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It is a degenerated mammal.
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It shows the stage between aves and mammls.
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It shows the stage between reptiles and birds.
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It shows the stage between reptiles and mammals.
Explanation
Duck billed platypus is a connecting link between reptiles and mammals because they have mammalian characters, like mammary glands, hair, diaphragm, single aortic arch and lay eggs like reptiles. Hence, option D is correct.
Ornithorhynchus
and
Tachyglossus
monotreme mammals are found in
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India
0%
Japan
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Australia
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All of the above
Explanation
The platypus (
Ornithorhynchus
) also known as the duck-billed platypus is a semi-aquatic egg-laying mammal endemic to eastern Australia. Echidna (
Tachyglossus
) is also egg laying mammal found exclusive in Australia. The primitive mammals are found only in Australia region due to the geographical isolation. Hence, option C is correct.
Hedgehog is included under
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Prototheria
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Eutheria
0%
Reptilia
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Aves
Explanation
A 'hedgehog' belong to the subfamily
Erinaceinae, in the order Erinaceomorpha. They found in Europe, Asia, Africa and New Zealand. All placental mammals are eutherians and hedgehog is one of them. Hence, option B is correct.
Character found only in mammals is
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Homeothermy
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Viviparity
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Dicondylic skull
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Diaphragm
Explanation
The diaphragm
is the only organ, which only and all
mammals
have and without which no
mammals can live. It is a sheet of internal skeletal muscle that extends across the bottom of the thoracic cavity. The diaphragm separates the thoracic cavity containing the heart and lungs, from the abdominal cavity and performs an important function in respiration. As the diaphragm contracts, the volume of the thoracic cavity increases and air is drawn into the lungs. Hence, option D is correct.
Which of the following is found only in mammals?
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Neck
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Mammary glands
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Limbs
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Brain
Explanation
Mammals are the only organisms that have mammary glands. Mammary glands are responsible for the production of milk that provides nourishment to their young ones.
Neck, limbs, and brain are present in other animals also like birds, some reptiles, some amphibians, etc.
Hence, option B is correct.
Immature birth take place in
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Kangaroo
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Dog
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Tiger
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Rabbit
Explanation
The immature kangaroo or joey is born alive when it is only about 2 cm long and weighs less than a gram. Immediately after birth, it crawls up the mother's body and enters the pouch where they develop and once get maturity they came out of the pouch. Thus, the correct answer is option A.
Living mammals include
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Largest terrestrial animals
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Largest aquatic animals
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Egg laying animals
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All of the above
Explanation
Living mammals includes largest terrestrial animal, i.e., elephant, largest aquatic mammals, i.e., whales and egg laying animals, i.e., echidna and platypus. Hence, option D is correct.
All mammals have hairs except
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Cetaceans
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Chiropterans
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Primates
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Rodentians
Explanation
Cetacea
is a widely distributed and diverse infra-order of fully aquatic marine animals
.
Cetaceans, like whales, dolphins and porpoises are the largest group of hairless mammals.
they don not need body hairs as they possess blubber for insulation. Hence, option A is correct.
Intra-abdominal testes are found in
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Bat
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Elephant
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Whale
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All of the above
Explanation
Order
Chiroptera
, which includes bats,
order
Proboscidea,
which includes elephants and
Cetacea,
which includes marine mammals, like a dolphin, whale etc. all of them have intra-abdominal testes because their internal body temperature is optimum for sperm production. Hence, option D is correct.
In mammals connection between fetus and uterine wall form
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Placenta
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Inguinal canal
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Ureter
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Eustachian canal
Explanation
The placenta is a connective tissue that connects the developing fetus to the uterine wall and provides passage for the nutrient uptake, waste elimination and gas exchange via the mother's blood supply. It is the key characteristic of the mammals.Thus, the correct answer is option A.
Kidney of mammals is
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Pronephric
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Mesonephric
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Metanephric
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None of the above
Explanation
The elongates stalk of ureteric bud which later develops into the ureter is called as the metanephric kidney. Metanephric kidney is found in reptiles, birds and mammals. Metanephric kidney
begins developing about five weeks into gestation
. Hence, option C is correct.
Which of the following is a reptile?
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Salamander
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Turtle
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Newts
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Toad
Explanation
Reptiles are oviparous, cold blooded and have a three-chambered heart. Some examples of reptiles include turtle, snake, chameleon, house lizard, etc.
Therefore, the correct answer is option B.
What is common in bat, whale and rat?
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Absence of neck
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Muscular diaphragm between thorax
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Testes, outside abdominal cavity
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External ear pinna
Explanation
The diaphragm is the only organ, which only and all mammals have and without which no
mammals can live.
The diaphragm separates the thoracic cavity from the abdominal cavity and performs an important function in respiration. As a bat, whale and rat all are mammals, they all have a diaphragm.
Hence, option B is correct.
Which group of vertebrates comprises the highest number of endangered species?
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Mammals
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Fishes
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Reptiles
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Birds
Explanation
A taxon is endangered, when its populations have decreased or habitats have been reduced to the levels that pose an immediate danger of extinction. Mammals are the most complex animal that cannot easily adapt the environmental changes and some mammals are used as a source of industrial raw materials.thus due to climatic change and hunting their population is getting down and become endangered etc. Hence, option A is correct.
Which of the following is mismatched?
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Manis
- Spiny anteater
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Ornithorhynchus
- Duck billed platypus
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Pteropus
- Flying fox
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Pangolin
- Scaly anteater
Explanation
Spiny anteater is known as echidna.
Manis
is a genus of
Mammalia
, which are called as scaly anteaters. Echidna is the egg-laying mammal and belong to monotreme.
Which of the following is closest relative of man?
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Chimpanzee
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Gorilla
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Orangutan
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Gibbon
Explanation
Chimpanzees are closest living relatives to the humans and share more than 98 percent of genetic blueprint as humans and chimpanzees shared a common ancestor, who lived some four to eight million years ago. Hence, option A is the correct answer.
What is true for Mammalia?
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Platypus is oviparous
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Bats have feathers
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Elephant is a ovoviviparous
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Diaphragm is absent in mammals
Explanation
Mammals are characterized by the presence of mammary glands, muscular diaphragm, skin with hair and viviparity except for platypus which is the egg-laying mammal (oviparous).
Thus, the correct answer is option A.
Which of the following is viviparous?
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Flightless birds
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Whales
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Bats
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Both B and C
Explanation
Mammals are viviparous as they give birth to living young ones with a few exceptions. The whale is an aquatic mammal whereas, bats are flying mammals. Both give birth to young ones & hence, are viviparous. Birds of all types lay eggs, i.e. they are oviparous. So, option D is the correct answer.
Odd-toed mammal is
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Equus
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Panthera
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Chiroptera
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Oryctolagus
Explanation
Perissodactyls are known as odd-toed ungulates. It is an order of mammals. They are characterized by an odd number of toes.
Equus
is a genus of mammals in the family Equidae, which includes horses, asses, and zebras. They are odd-toed ungulates as have the odd number of toes with slender legs, long heads, relatively long necks, manes and long tails. Hence, option A is correct.
Which animal grows fastest among the given options?
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Blue whale
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Sea cow
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Sea lion
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None of the above
Explanation
The
blue whale is the mammal which possesses mammary gland and nourishes their young one by milk secreted from the mammary gland. Its milk is more concentrated due to the presence of large fat and protein content and thus there young one grow faster.
Hence, option A is correct.
Which one of the following is not exclusively marine?
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Seal
0%
Warlus
0%
Whale
0%
Dolphin
Explanation
Dolphins are found living in bodies of water around the world.
Most of them live in saltwater but they can also live in freshwater locations. Seal, walrus and whale are exclusively marine animals. They are considered as descendants of land-dwelling mammals.
So, the correct answer is option D.
Mammals giving rise to immature young ones and nourishing them in a
pouch are called as
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Monotremes
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Marsupials
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Primates
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Carnivores
Explanation
Marsupials are an infraclass of mammals found in Australia region. A distinctive characteristic, common to most species, is giving rise to immature young ones and nursing them in a pouch for 9 months. Once they get mature, comes out of the pouch.
Well-known
marsupials
include kangaroos, wallabies, koala, possums etc. Hence, option B is the correct answer.
The skin of some terrestrial animals such as reptiles is protected by:
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Feathers
0%
Slimy scales
0%
Dry scales
0%
Gills
Explanation
Reptiles have dry, scaly skin. The skin of reptiles is covered with scutes or scales which, along with many other characteristics, distinguish reptiles from animals of other classes.
Reptile scales are often brightly colored and vary in shape and size throughout their body. These scales are mostly made of a hard substance called keratin.
So, the correct answer is 'Dry scales'.
Microlecithal eggs with small amount of food reserve are found in
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Frog
0%
Insects
0%
Man
0%
Fish
Explanation
Microlecithal eggs are those eggs, which have very small amount of yolk is present. It is found in man.
In frogs mesolecithal eggs are found.
In insects c
entrolecithal eggs are found.
In fishes m
egalecithal eggs are found
. Hence, option C is correct.
Which among the following have scales?
(i) Amphibians
(ii) Pisces
(iii) Reptiles
(iv) Mammals
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(i) and (iii)
0%
(iii) and (iv)
0%
(ii) and (iii)
0%
(i) and (ii)
Explanation
Amphibians do not have scales and their skin is permeable so allow the diffusion of gasses.
Reptiles are covered with scales and have tough skin so that they can easily adapt to the terrestrial environment.
Fish have scales.
Pisces have dermal scales while reptiles have horny epidermal scales.
So, the correct answer is option C.
Sonar system is found only in
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Bats
0%
Whales
0%
Both A and B
0%
None of the above
Explanation
Biosonar or sonar system helps dolphins, whales, bats, and a few other vertebrates to detect distant objects by echolocation. These organisms emit high-pitched sounds that bounce off objects in its path and produce an echo back. They respond rapidly to the echo and skillfully avoid obstacles and captures prey. Other organisms can not hear the sound waves or can hear the only limited number of sounds produced by an organism using echolocation. Thus, the correct answer is option C.
A group of animals having marsupium is known as
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Monotremata
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Eutheria
0%
Metatheria
0%
Pantotheria
Explanation
Metatherian mammals are also known as marsupials.
Today, most marsupials are found in Australasia due to geographical isolation.
It contains all of the living mammals with abdominal pouches. Kangaroo is the most common example. Hence, option C is the correct answer.
Which of the following organism lays eggs yet secretes milk to nourish the young one?
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Bat
0%
Kangaroo
0%
Platypus
0%
Ostrich
Explanation
Platypus is a mammal as it has mammary glands that secrete milk to nourish the young ones. However, the platypus is an egg-laying aquatic mammal. They are
endemic to the regions of eastern Australia.
Bat is a flying mammal, Kangaroo is a mammal that gives birth to underdeveloped young ones. Ostrich is a bird.
So, the correct answer is option C.
Which of the following organism lives in ocean and is known for feeding its young ones?
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Turtle
0%
Whale
0%
Penguin
0%
Fish
Explanation
Whales are aquatic mammals. Like other mammals, t
hey have mammary glands that secrete milk to feed their young ones.
So, the correct answer is 'Whale.'
Which of the following animals has long sticky tongue?
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Cow
0%
Eagles
0%
Pangolins
0%
Cheetahs
Explanation
Pangolin or
Manis
are commonly called scaly anteaters. They have a protective covering of sales on their bodies which are basically made up of keratin. They are nocturnal animals and mainly feed on ants and termites. They have long protrusible tongues that help them to catch ants and termites The presence of sticky saliva on their tongues also enhance their ability to catch their prey.
So, the correct answer is 'Pangolins'.
All mammals have
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Hair
0%
Mammary glands
0%
Both A and B
0%
None of the above
Explanation
Correct option - C
Explanation for correct option -
Mammals are a group of vertebrate animals.
T
hey belong to kingdom Animalia and class Mammalia.
They all have red blood cells which are nucleated. All mammals have hair on their body and have mammary glands also.
In which of the following the body is completely covered with scales?
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Snake
0%
Sparrow
0%
Snail
0%
Frog
Heart of crocodile is _______.
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Single chambered
0%
Two chambered
0%
Three chambered
0%
Four chambered
Mammals have ............ chambered hearts.
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One
0%
Two
0%
Three
0%
Four
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