CBSE Class 12 Biology Reproduction in Organisms MCQs Set C

Question: Which of the following parts are used for vegetative reproduction in Pistia?
a) Runners
b) Offsets
c) Suckers
d) Stolons
Answer: b

Question: The period from birth to the natural death of an organism represents –
a) Reproductive phase
b) Life cycle
c) Life span
d) Life style
Answer: c

Question: Bamboo species flowers –
a) Every year
b) Once in 12 years
c) Only once in lifetime
d) Twice in 50–100 years
Answer: c

Question: Which of the following statements is false?
a) Asexual reproduction is simpler than sexual reproduction
b) Asexual reproduction occurs by fission, budding and fragmentation
c) In most of the animals both asexual and sexual modes of reproduction are found
d) Vegetative and sexual modes of reproduction are exhibited by the higher plants
Answer: c

Question: Which of the following statements is true about water hyacinth?
a) It gives useful products to be used in medicine
b) It is a marine plant
c) It takes oxygen from water which causes death of fishes
d) It is being cultivated in sea water for biogas
Answer: c

Question: Which of the following animals shows longitudinal binary fission?
a) Euglena
b) Plasmodium
c) Planaria
d) Paramecium
Answer: a

Question: Select the correct sequence from the following –
a) Gametogenesis → Syngamy → Zygote → Embryogenesis
b) Gametogenesis → Syngamy → Embryogenesis → Zygote
c) Zygote → Embryogenesis → Gametogenesis
d) Syngamy → Gametogenesis → Zygote → Embryogenesis
Answer: a

Question: Spermatids are transformed into spermatozoa by –
a) Spermitation
b) Spermatogenesis
c) Spermiogenesis
d) Spermatosis
Answer: c

Question: Which of the following plants do not show clear-cut vegetative, reproductive and senescent phases?
a) Perennial plants
b) Annual plants
c) Biennial plants
d) Either b or c
Answer: a

Question: Which of the following sequences of organisms is correct in respect of life spans?
a) Banyan tree > Parrot > Elephant > Crocodile > Crow
b) Crow > Crocodile > Elephant > Parrot > Banyan tree
c) Banyan tree > Elephant > Crocodile > Parrot > Crow
d) Crow > Parrot > Elephant > Crocodile > Banyan tree
Answer: a

Question: Which of the following is correct about Strobilanthus kunthiana?
a) It flowers once in 12 years
b) The plant last flowered in September–October 2006
c) Its mass flowering converted large hilly tracts into blue stretches attracting tourists
d) All of the above
Answer: d

Question: Which of the following regulates reproductive processes and associated behavioural expressions of organisms?
a) Hormones
b) Environmental factors
c) Abiotic components
d) Interaction between hormones and environmental factors
Answer: d

Question: In flowering plants both male and female gametes are non-motile. The method to bring them together for fertilization is –
a) Water only
b) Air only
c) Pollination
d) Apomixis
Answer: c

Question: Find out the organism with highest life span –
a) Tortoise
b) Horse
c) Dog
d) Fruit fly
Answer: a

Question: Clone is the product of –
a) Sexual reproduction
b) Sexual or asexual reproduction
c) Amphimixis
d) Asexual reproduction
Answer: d

Question: In grafting, contact is made between –
a) Cambium
b) Flower
c) Xylem
d) Phloem
Answer: a

Question: Seeds are called products of sexual reproduction because they –
a) Give rise to new plants
b) Are formed by fusion of gametes
c) Can be stored for a long time
d) Are formed by fusion of pollen tubes
Answer: b

Question: A scion is grafted on stock. The quality of fruits produced will be determined by the genotype of –
a) Stock
b) Scion
c) Both stock and scion
d) Neither stock nor scion
Answer: b

Question: Vegetative propagation in mint occurs by –
a) Offset
b) Rhizome
c) Sucker
d) Runner
Answer: c

Question: No individual is immortal except –
a) Single celled organisms
b) Green plants
c) Sponges
d) Drones
Answer: a

Question: The fastest method to obtain clones is through –
a) Induced mutation
b) Parasexual hybridization
c) Parthenogenesis
d) Vegetative reproduction
Answer: d

Question: In small flies such as Miastor, reproduction occurs in larval stage. It is called –
a) Neoteny
b) Paedogenesis
c) Parthenogenesis
d) Paedocopy
Answer: b

Question: In which of the following are fertilized eggs covered by a hard calcareous shell?
a) Frog
b) Reptiles and birds
c) Mammals
d) Frog and toad
Answer: b

Question: Individuals of a clone –
a) Are genetically similar but morphologically different
b) Are morphologically similar but genetically different
c) Are morphologically and genetically similar
d) Are genetically and phenotypically different
Answer: c

Question: In Monerans (e.g. Bacteria) and Protists (Amoeba, Paramecium, Euglena etc.), asexual reproduction occurs by –
a) Budding
b) Multiple fission
c) Binary fission
d) Amphimixis
Answer: c

Question: “How organisms reproduce” depends upon –
a) Habitat of organisms
b) Internal physiology of organisms
c) Genetic makeup
d) All of the above factors
Answer: d

Question: Asexual reproduction is common –
a) Among single celled organisms only
b) Among plants only
c) Among single celled organisms, plants and all animals
d) Among single celled animals, plants and animals with simple organizations
Answer: d

Question: Some organisms reproduce both asexually and sexually. When conditions become stressful, they switch to sexual mode because –
a) Sexual reproduction is simple and rapid
b) Sexual reproduction requires two individuals for mutual support
c) Sexual reproduction produces new chromosome combinations, increasing diversity
d) Asexual reproduction requires more energy
Answer: c

Question: Bamboo species flowers –
a) Every year
b) Once in 12 years
c) Only once in lifetime
d) Twice in 50–100 years
Answer: c

Question: Ploidy of ovary, anther, egg, pollen, male gamete and zygote are respectively –
a) 2n, 2n, n, 2n, n, 2n
b) 2n, 2n, n, n, n, 2n
c) 2n, n, n, n, n, n
d) 2n, 2n, n, 2n, 2n, 2n
Answer: b

Question: Meiosis –
a) Does not take place in organisms showing asexual reproduction only
b) Takes place in sexually reproducing haploid organisms
c) Takes place in sexually reproducing diploid organisms
d) All of the above are correct
Answer: d

Question: In which of the following organisms is self-fertilisation seen?
a) Fish
b) Roundworm
c) Earthworm
d) Liver fluke
Answer: d

Question: In majority of organisms male gamete is _______ and female gamete is _______.
a) Motile, motile
b) Non-motile, non-motile
c) Non-motile, motile
d) Motile, stationary (non-motile)
Answer: d

Question: Find out the correct statement –
a) Life spans of organisms are necessarily correlated with their sizes
b) The sizes of crows and parrots are not very different, so their life spans are almost similar
c) A peepal tree has much shorter life span compared to a mango tree
d) Reproduction is essential for continuity of species on the earth
Answer: d

Question: Transverse binary fission occurs in –
a) Euglena
b) Amoeba
c) Hydra
d) Paramecium
Answer: d

Question: Which of the following is a false statement?
a) All organisms have evolved similar mechanism to multiply and produce offsprings
b) Asexual reproduction is uniparental
c) Sexual reproduction is biparental
d) In asexual reproduction no fertilization occurs
Answer: a

Question: Oestrus cycle is seen in –
a) Cows and sheep
b) Rats and deers
c) Dogs and tiger
d) All
Answer: d

Question: Among the following which one is not a method of asexual reproduction –
a) Budding (e.g. yeast)
b) Layering
c) Sowing
d) Binary fission
Answer: c

Question: Animals which give birth to young ones are said to be –
a) Viviparous
b) Amphibious
c) Coelomates
d) Oviparous
Answer: a

Question: Which of the following is not a vegetative propagule?
a) Rhizome and sucker
b) Tuber and offset
c) Bulbil (e.g. in Agave), leaf buds, bulb
d) Antherozoid
Answer: d

Question: Which of the following is viviparous?
a) Reptiles
b) Frog
c) All mammals
d) Majority of mammals
Answer: d

Question: Find the correct combination –
a) Zoospore in sponge
b) Conidia in algae
c) Gemmules in Penicillium
d) Buds in Hydra
Answer: d

Question: Which of the following is cultivated through vegetative propagation –
a) Potato and sugarcane
b) Banana and ginger
c) Dahlia and rose
d) All
Answer: d

Question: Ciliated motile spores are called –
a) Aplanospores
b) Conidia
c) Zoospores
d) Oospores
Answer: c

Question: Menstrual cycle is reported in –
a) Only humans
b) Only apes
c) Only monkeys
d) Primates like humans, apes and monkeys
Answer: d

Question: Birds in captivity (as in poultry farms) can be made to lay eggs throughout the year. In this case laying eggs is –
a) Related to reproduction and a commercial exploitation for human welfare
b) Neither related to reproduction nor a commercial exploitation for human welfare
c) Not related to reproduction but a commercial exploitation for human welfare
d) Related to reproduction but not a commercial exploitation for human welfare
Answer: c

Question: Which of the following are seasonal breeders?
a) Frogs
b) Birds
c) Lizards
d) All
Answer: d

Question: Offsprings of oviparous animals are at greater risk as compared to offsprings of viviparous animals because –
a) Proper embryonic care and protection is lesser
b) Embryo is not developed
c) Progenies are with more variation
d) Progenies are larger
Answer: a

Question: The motile reproductive structure of algae and fungi, which directly give rise to new individuals, are called –
a) Cysts
b) Conidia
c) Buds
d) Zoospores
Answer: d

Question: A. The plant was introduced in India because of its beautiful flowers and shape of leaves
B. It can propagate vegetatively at a phenomenal rate and spread all over water body in a short period
C. It is very difficult to get rid off these plants A to C points are related to –
(a) Dahlia
(b) Water hyacinth
(c) Azolla (water fern)
(d) Mosses
Answer: b

Question: Select the correct sequence from the following.
I. Juvenile phase —> Senescent phase —> Reproductive phase
II. Juvenile phase —> Reproductive phase —> Senescent phase
III. Reproductive phase —> Juvenile phase —> Senescent phase
IV Vegetative phase —> Reproductive phase —> Senescent phase
(a) I and II
(b) I and IV
(c) III and IV
(d) II and.IV
Answer: d