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CBSE Questions for Class 12 Medical Biology Strategies For Enhancement In Food Production Quiz 7 - MCQExams.com
CBSE
Class 12 Medical Biology
Strategies For Enhancement In Food Production
Quiz 7
Mule is an example of
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Cross-breeding
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Interspecific Hybridization
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Out-breeding
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Out-crossing
Explanation
Hybridization is the
crossing between two animals of different species to produce a new variety called hybrid. The crossing
between two different species of the same genus is called interspecific crossbreeding. Horse and donkey belong to the same genus
Equus
. A mule is obtained by a cross between a male donkey and female horse.
Thus, the correct answer is option B.
In a colony of honey bee, male drones are originated by
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Diploid parthenogenesis
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Cyclic parthenogenesis
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Arrhenotoky
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Thelotoky
Explanation
Honey bees are classified into three categories queen, worker and drone. Drones are male honey bees. They are developed from unfertilised female eggs. This phenomenon is called arrhenotoky.
Pathenogenesis means the development of unfertilised eggs or haploid eggs into young ones as the development of drones female bee develops from diploid fertilized ovum. Thelotoky is also a type of parthenogenesis. Thus, the correct answer is option C.
Which is not a major carp?
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Cirrhinus mrigala
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Labeo rohita
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Puntius tieto
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Ctenopharyngodon idella
Explanation
A.
Cirrhinus mrigala
, known as the white carp, is a ray finned fish.
B.
Labeo rohita
, commonly known as Rohu, is a carp fish found in rivers of South Asia.
C.
Puntius tieto
is a small and freshwater fish. It belongs to family
Cyprinidae.
D.
Ctenopharyngodon idella
is known as the grass carp. In aquaculture, it is reported to have largest production.
Hence,
Puntius tieto
is not a major carp. So, the correct answer is
'Puntius tieto'.
Given below are assertion and reason.
Point out if both are true with reason being correct explanation (A),
Both true but the reason is not correct explanation (B),
The assertion is true but the reason is wrong (C),
Both are wrong (D).
Assertion. Fish meal is a rich source of protein for cattle and poultry.
Reason. Fish meal is produced by non-edible parts of fishes like fins, tails, etc.
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(A)
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(B)
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(C)
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(D)
Bee dances are meant for
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Courtship
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Communication
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Recreation
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Instinct.
Explanation
Bee dances are meant for
$$ \Rightarrow $$ Communication
$$ \rightarrow $$ prof karl van Frisch decoded the language
of "bee dance and got "noble prize".
He discovered scout bees performer lesso types
of dance for Communication.
i) Round dance when a newly discovered
food source is close to the hive.
ii) Tail wagging dance is performed for
long distance sources.
Growing more than one species of fish in the same water body is
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Moriculture
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Aquaculture
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Monoculture
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Polyculture
Explanation
A. Moriculture is the plantation of mulberry plants to increase the production of silk as silkworms feed on mulberry leaves.
B. Aquaculture, also known as aquafarming, is the farming of aquatic species of fish, plants, molluscs etc.
C. Monoculture is the growing of single species in the same place.
D. Polyculture is the growing of more than one species in the same place.
Hence, g
rowing more than one species of fish in the same water body is polyculture.
So, the correct answer is 'Polyculture'.
In which of the following type of bees are the wax glands are present?
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Workers
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Drone
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Queen bee
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Both queen and worker bees
Explanation
Beeswax (cera alba) is a natural wax produced by honey bees of the genus Apis.
The wax is formed into scales by eight wax-producing glands in the abdominal segments of worker bees, which discard it in or at the hive.
So, the correct answer is 'Workers'.
Commercial rearing of honey bees is
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Sericulture
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Silviculture
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Entomology
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Apiculture
Isinglass is employed in
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Preparation of wines
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Distillation of wines
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Preservation of wines
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Clearing of wines
Explanation
Isinglass is a by product which is obtained from the dried swim bladder. It is a form of collagen protein and is used for clarification of wine, beer and vinegar.
So, the correct answer is 'Clearing of wines'.
Fish glue is obtained from
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Air bladder and skin
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Liver and skin
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Bones and skin
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Scales and skin
Science of raising improved varieties without gene manipulation is
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Breeding biology
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Horticulture
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Sericulture
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Olericulture
Explanation
The answer is option A i.e. "Breeding biology".
Breeding biology results in improved varieties (e.g. the commercial products, cultivars or hybrids of crops) through the mating of two or more parental lines that contain desirable characteristics.
Sericulture is the cultivation of silkworms to produce silk.
Horticulture is the management of fruits, vegetables, and ornamental plants.
Olericulture is a branch of horticulture that deals with the production, storage, processing, and marketing of vegetables.
Powdery mildew of Pea is caused by :
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Puccinia
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Erysiphe
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Ustilago
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Alternaria
Waggle dance in Honey Bee represents
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Distance of food source
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Direction of food source
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Both distance and direction of food source
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Distance and direction of enemy
Explanation
The waggle dance is a special 'figure of eight' dance that is done by the honey bee in its hive. By this, a worker tells the others where it has found nectar. It is done to give other bees information about the direction and distance to flowers that have nectar or pollen or both.
Which is true about bees
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Apis indica
is the largest species is India
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Bees wax is wasteful product
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Honey has glucose and arabinose as main constituents
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Communication in bees was first studied by Frisch.
Honey is____________.
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Alkaline
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Acidic
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Neutral
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Basic after some days.
A colony of honey bee consists of__________________.
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One queen and a few drones
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One queen, 10-100 drones and 20000-80000 workers
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Two queens, 5-10 drones and 20000 workers
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No queen, 10-20 drones and 80000 workers
Honey mainly consists of___________.
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Monosaccharides
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Disaccharides
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Polysaccharides
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Fats
Explanation
A mixture of monosaccharids sugars and other carbohydrates, Honey is mainly fructose(about $$38\%$$) and glucose(about $$32\%$$), with remaining sugars including maltose, Sucrose and other complex carbohydrates. It's glycemic index ranges from $$31$$ to $$8$$, depending on the variety.
Life span of a worker bee is _________.
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10 days
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15 days
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8 weeks
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6 weeks
Most widely reared Honey Bee species of India is ______________.
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Apis mellifera
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Apis dorsata
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Apis indica
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Apis florea
Nobel prize for deciphering the dance language of Honey Bee was awarded to
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C. Darwin
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K. V. Frisch
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W. Harvey
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H. G. Khorana
Explanation
-K.V. Frisch was an Austrian ethologist who receive the Nobel prize in physiology or medicine in $$1913$$
-His work centered on investigation of the sensory perceptions of honey bee and he was one of the first to translate the meaning of the waggle dance.
-His theory, described in his $$1927$$ book Aus dem leben der Bienen(translated into English as the Dancing Bees).
Which is wrong about Bee colony
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Sex differentiation is based on haplodiploidy
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Female dominated society
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Domesticated species are A. indica and A. mellifera
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Fertilized eggs develop into sterile females only.
Life cycle of Mulberry Silkworm is completed in
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20 days
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30 day
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35 days
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45 days
In Honey Bee, drones are__________.
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Haploid males
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Haploid females
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Diploid males
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Diploid females.
Worker bees are____________.
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Sterile females
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Fertile females
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Sterile drones
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Become fertile females in absence of queen.
Tail wagging dance of bees is meant for indicating a location situated at a distance of ________.
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10 m
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50 m
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Less than 75 m
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More than 75 m.
Explanation
D) More than $$ 75\,m $$
As the food source becomes more
distant the round dance is replaced by the
waggle dance. The waggle dance includes
information about the direction and energy
required to fly to the goal. Energy expenditure
is indicated by the length of time it takes
to make one circuit.
Round dance of bee indicates _________.
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Courtship
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Arrival of queen
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Location of flowers
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Location of predator.
Explanation
Round Dance of bee indicates
C) Location of Flowers.
Round dance of bee indicates locations of flowers.
It is a communicative behavior of a foraging
honey bee in which she moves on the comb in close
to the hive in close circles, alternative right and
then left.
The most commonly maintained species of bee by bee keepers is
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Apis dorsata
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Apis mellifera
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Apis indica
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Apis florea
In royal jelly percentage of maltose and other sugars is _______.
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9.2%
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10.5%
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11.2%
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8.81%.
Royal jelly is secreted from
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Hypopharyngeal gland
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Milk gland
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Salivary gland
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Integumentary gland.
Honey Bee belongs to____________.
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Apis
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Daphnia
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Leptocorisa
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Limulus.
Termitarium is the nest of___________.
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Bees
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Wasps
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White Ants
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Black Ants.
Explanation
C) White Ants
Termites are also known as White Ants. So,
white ants lines in the termitarium nest.
A nest built by a colony of termites underground
as in a tree as an artificial
nest used to house termites in a laboratory.
The product of apiculture is _________.
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Honey
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Royal jelly
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Bee wax
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All of the above
Rapidly dividing unorganised mass of cells in tissue culture is
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Callose.
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Callus.
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Embryoid.
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Plantlet.
Explanation
Tissue culture is a growth of cells or tissues separate from the organism in an artificial environment. The process is called as micropropagation in plant tissue culture. In tissue culture, the small piece of plant or animal is used to grow complete individual and those small parts are called as explants whereas complete grown individuals are called clones. The explant initially turns into rapidly dividing unorganised mass of cells on solid or liquid culture and that is called a callus.
Callus was grown successfully for the first time by
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White
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Gautheret
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Nobecourt
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All of the above
Explanation
D. All of the above
Solution : Callus is undifferentiated, unspecialized mass of cells.
White in 1934 introduce vitamin B as growth supplement of tomato root tip. Later Gautheret and Nobecourt established endless proliferation tissue culture around in 1939.
So the correct answer is option D.
Animal cloning is carried out by
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Artificial fertilization of ovum.
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Direct growth of ovum.
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Ovum with somatic nucleus.
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All of the above.
Explant is
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Propagule.
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Callus used for subculturing.
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Part of plant used in tissue culture.
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Part of tissue culture used for planting.
Explanation
Correct Answer: C
Explanation:
An
explant
can be defined as a part of any plant which is taken for the purpose of
tissue culture.
The explants are kept in a nutritive media in a sterile condition to culture the cells of the plant and to produce a new generation of cells.
Hence, the correct answer is
Part of plant used in tissue culture.
Steward performed experiment to prove cellular totipotency on _______ .
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Tomato
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Carrot
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Tobacco
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Potato
Explanation
B. Carrot
Solution : Steward performed their experiment on roots of carrot to prove cellular totipotency or the cells that can give rise to whole plant.
So the correct answer is "Carrot".
Cellular totipotency means
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Synthesis of new cells.
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Formation of new species.
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Formation of new plants.
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Capability of plant cell to form complete plant.
Explanation
Cellular totipotency means the ability of a cell to give rise to complete individual i.e., the formation of the complete cellular organisation from a single cell. Plant cells are totipotent as they can give rise to complete plant. So answer D is correct.
Who proposed for the first time that cells are totipotent?
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White
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Haberlandt
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Steward
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Halperin and Wetherell
Explanation
B. Haberlandt
Solution : Cells are totipotent was first proved by Haberlandt and is called the father of plant tissue and also said that a totipotent cell can give rise to whole plant.
So the correct answer is "Haberlandt".
A plant cell has potential to develop into full plant. The property is called
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Tissue culture
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Pleuripotency
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Totipotency
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Gene cloning
Explanation
Totipotency is the ability of a single cell to divide and produce all of the differentiated cells in an organism.
For example, Spores and zygotes are examples of totipotent cells.
Hence a plant cell has the potential to develop into a full plant. The property is called Totipotency.
So, the correct answer is 'Totipotency'.
Concept of cellular totipotency was established by
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White
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Haberlandt
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Steward
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Muir
Explanation
Cellular totipotency is the ability of a single cell to produce all cell types and to organize them into an entire organism when cultured in a suitable culture medium at an appropriate temperature and aeration conditions. For example, Spores and zygote are examples of the totipotent cell.
The concept of totipotency was established by a German Botanist, Professor Gottlieb Haberlandt in 1902 in the plant body. He stated that every living cell of the plant body able to regenerate the whole plant body because it is derived from the fertilized egg and contain hereditary information.
Hence concept of cellular totipotency was established by Haberlandt.
So, the correct answer is 'Haberlandt'.
First successful tissue culture was that of ________.
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Tomato root
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Carrot root
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Potato stem
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Tobacco callus
Explanation
White was the first one to successfully attempt the technique of tissue culture.
He cultured tomato roots in a nutrient media composed of vitamins.
He developed the continuously growing callus from the root which had the property of totipotency.
So the correct answer is option A.
Tissue culture was developed by
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Haberlandt
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Laibach
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White
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Steward
Explanation
In 1902 C.Haberlant was the first attempted to culture isolated plant cells invitro on artificial medium. But the discovery of the use of auxin is done by three scientists Gautherel, Nobecourt, and White. This discovery is the second phase of plant tissue culture. Then White discovery's proves that plant could be successfully regenerated from undifferentiated tissue or even single cell in culture called tissue culture. Then tissue culture was developed by P R White in 1925.
So the correct option is C.
Tissue culture is
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Growth of specific plant structures on artificial medium
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Growth and multiplication of cells on artificial medium
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Cryogenic maintenance of tissues
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Maintenance, growth and differentiation of cells, tissues and organs on, artificial medium
Explanation
Tissue culture is a biological technique which involves the development of plant under the controlled condition on a nutrient culture medium of the known composition. The pant developed by the tissue culture are cloned and maintained by the process of micropropagation. Gottlieb Haberlandt was the first to attempt tissue culture. He was first to point out the possibilities of the culture of isolated tissues.
The cultured cells forms callus. Callus when treated with auxin it promotes rooting and when it is treated with cytokinin it stimulates cell maturation, differentiation and finally, promotes the development of stem.
So, the correct answer is option D.
Part of plant used for culturing is called:
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Scion
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Explant
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Stock
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Callus
Explanation
A piece of young stem or bud which is inserted into a rootstock is called scion.
Tissue culture is a biological technique which involves the development of the plant by the totipotent cells under the controlled condition on a nutrient culture medium of the known composition. The totipotent cells are taken from the active part of the plant like root, stem leaf, pollen etc. The plant part which is used for the culture is known as explant.
A rooted stem into which a scion or a bud is grafted is called a stock.
Callus is unorganized actively dividing the mass of cells maintained in culture. It has a meristematic cell which has ample amount of cytoplasm to trigger cell division. It is treated with the growth hormones to allow the cell division and differentiation.
So, the correct answer is option B.
Spermaceti is
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Sweetener
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Animal wax
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Mineral wax
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Defensive protein
Explanation
Spermaceti is a waxy substance found in the head cavities of the sperm whale. Spermaceti is created in the spermaceti organ inside the whale's head. Spermaceti was used chiefly in ointments, cosmetic creams, fine wax candles, pomades, and textile finishing; later it was used for industrial lubricants. The spermaceti was separated from the oil by chilling in a process whalers called wintering; it congealed as a white crystalline, waxy solid.
So, the correct answer is 'Animal wax'.
Which of the following statement is correct?
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In
Flagellaria
, male is heterogametic
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In honeybee, functional male does not undergo meiosis during gamete formation
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In
Bonellia
, a hormone-like substance secreted by the proboscis is responsible for femaleness
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Due to the addition of one extra X-chromosome in
Drosophila
in uninucleated state gynandromorph is observed
Explanation
Queen bee is the only fertile female whose primary function is the reproduction. She produces both fertilized and unfertilized eggs. Fertilized eggs will hatch into female worker bees, while unfertilized eggs will become drones or honey bee males. Hence no gamete formation is involved in the formation of male honey bees.
Thus the correct answer is option B.
The study of plant and animal tissues outside the body (in a glass tube) is called
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In vivo
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In vitro
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Innate
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Ecdysis
Explanation
B. In vitro
Solution : Study of plant and animal tissues outside their original environment that are the cells under in vitro analysis. It means the cellular studies are done inside a test tube by imitating the subcellular environment whereas in vivo is the study of cells inside their own environment and performing the experiments in sub cellular environment.
So the correct answer is "In vitro"
The smallest viable unit which can grow, multiply and form a plant in tissue culture is
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Chromosome
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Nucleus
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Cell
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Tissue
Explanation
The smallest viable unit which can grow, multiply and form a plant in tissue culture is the cell. A cell is a viable unit of the plant which is cultured in the tissue culture. When a cell is cultured, under the controlled condition on a nutrient culture medium of known composition by the technique of tissue culture, the genetic material of the cell starts dividing and increases the cell number by the formation of callus. The callus utilizes the auxin and cytokinin to form root and shoot respectively by the process of cell differentiation and specialization.
So, the correct answer is option C.
Tissue culture technique was first performed successfully by
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Haberlandt
0%
Nobecourt
0%
White
0%
Gautheret
Explanation
Tissue culture is a biological technique which involves the development of plant under the controlled condition on a nutrient culture medium of the known composition.
White was the first one to successfully attempt the technique of tissue culture. He cultured tomato roots in a nutrient media composed of vitamins. He developed the continuously growing callus from the root which had the property of totipotency.
So, the correct answer is option C.
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