CBSE Class 12 Biology Reproduction in Organisms MCQs

Question: Which of the following situations correctly describe the similarity between an angiosperm egg and a human egg?

i. Eggs of both are formed only once in a lifetime

ii. Both the angiosperm egg and human egg are stationary

iii. Both the angiosperm egg and human egg are motile transported

iv. Syngamy in both results in the formation of zygote

Choose the correct answer from the options given below

a) iv only

b) iii and iv

c) i and iv

d) ii and iv

Answer: iv only

Question: Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because

a) Nodes have meristematic cells

b) Nodes are located near the soil

c) Nodes have non-photosynthetic cells

d) Nodes are shorter than internodes

Answer: Nodes have meristematic cells

Question: Which of the following statements, support the view that elaborate sexual reproductive process appeared much later in the organic evolution.

i. Lower groups of organisms have simpler body design

ii. Asexual reproduction is common in lower groups

iii. Asexual reproduction is common in higher groups of organisms

iv. The high incidence of sexual reproduction in angiosperms and vertebrates

Choose the correct answer from the options given below

a) ii and iv

b) ii and iii

c) i and iii

d) i and iii

Answer: ii and iv

Question: Offspring formed by sexual reproduction exhibit more variation than those formed by Asexual reproduction because

a) Gametes of parents have qualitatively different genetic composition

b) Genetic material comes from parents of two different species

c) Greater amount of DNA is involved in sexual reproduction

d) Sexual reproduction is a lengthy process

Answer: Gametes of parents have qualitatively different genetic composition

Question: Choose the correct statement from amongst the following

a) Dioecious organisms are seen in both plants and animals

b) Dioecious organisms are seen only in vertebrates

c) Dioecious organisms are seen only in plants

d) Dioecious (hermaphrodite) organisms are seen only in animals

Answer: Dioecious organisms are seen in both plants and animals

Question: There is no natural death in single celled organisms like Amoeba and bacteria because:

a) Parental body is distributed among the offspring

b) They are microscopic

c) They reproduce by binary fission

d) They cannot reproduce sexually

Answer: Parental body is distributed among the offspring

Question: There are various types of reproduction. The type of reproduction adopted by an organism depends on

a) The organism’s habitat, physiology and genetic makeup

b) Morphology and physiology of the organism

c) Morphology of the organism

d) The habitat and morphology of the organism

Answer: The organism’s habitat, physiology and genetic makeup

Question: Identify the incorrect statement.

a) Zoospores are sexual reproductive structures

b) In asexual reproduction, the offspring produced are morphologically and genetically identical to the parent

c) In asexual reproduction, a single parent produces offspring with or without the formation of gametes

d) In asexual reproduction, a single parent produces offspring with or without the formation of gametes

Answer: Zoospores are sexual reproductive structures

Question: Which of the following is a post-fertilisation event in flowering plants?

a) Choose the correct option

b) Formation of flower

c) Formation of pollen grains

d) Transfer of pollen grains

Answer: Choose the correct option

Question: The number of chromosomes in the shoot tip cells of a maize plant is 20. The number of chromosomes in the microspore mother cells of the same plant shall be

a) 20

b) 10

c) 40

d) 15

Answer: 20

Question: Which of the following statements is true of yeast?

a) The cell divides unequally. The smaller cell develops into a bud

b) The cell divides by binary fission. One of them develops into a bud

c) The cell produces conidia, which develop into a bud

d) None of these 

Answer: The cell divides unequally. The smaller cell develops into a bud

Question: Which of the following statements is true of Hydra?

a) It produces multicellular bud

b) It produces unicellular bud

c) None of these

d) It produces asexual gemmules

Answer: It produces multicellular bud

Question: Which of the following statements is true of Hydra?

a) It produces multicellular bud

b) It produces unicellular bud

c) It produces asexual gemmules

d) None of these

Answer: It produces multicellular bud

Question: Which of the following statements is true of Bryophyllum?

a) Geminating bud appears from the notch at the leaf margin

b) Germinating bud appears from the node of the rhizome

c) Germinating bud appears from the node of the rhizome

d) None of these

Answer: Geminating bud appears from the notch at the leaf margin

Question: Which of the following statements is true of date palm?

a) It is dioecious producing staminate flowers in one tree and pistillate flowers in another tree

b) It is monoecious producing staminate flowers in one tree and pistillate flowers in another tree

c) It is monoecious producing both staminate flowers and pistillate flowers in the same plant

d) None of these 

Answer: It is dioecious producing staminate flowers in one tree and pistillate flowers in another tree

Question: The terms homothallic and monoecious are used to denote

a) bisexual condition

b) staminate flowers

c) pistillate flowers

d) unisexual condition

Answer: bisexual condition

Question: Planaria’s most remarkable characteristics are its ability to

a) Regenerate

b) Generate bioluminescence

c) Survive without air

d) Hibernation

Answer:  Regenerate

Question: The most significant feature of vegetative propagation is that

a) it is a method of producing a large number of individuals genetically identical to the parent.

b) it is a method of producing a large number of individuals genetically different from the parent.

c) it ensures that the progeny individuals are resistant to diseases and pests

d) it is an age old practice

Answer: it is a method of producing a large number of individuals genetically identical to the parent.

Question: Fusion of unrelated gametes is called

a) Fertilization

b) None of the above

c) Autogamy

d) Dichogamy

Answer: Fertilization

Question: In animals, juvenile phase is followed by

a) In animals, juvenile phase is followed by

b) senescent phase

c) old age

d) vegetative phase

Answer: In animals, juvenile phase is followed by

Question: Bryophyllum daigremontianum reproduces by

a) Vegetative propagation

b) Budding

c) Fission

d) Fragmentation

Answer: Vegetative propagation

Question: External fertilisation occurs in majority of

a) algae

b) mosses

c) liverworts

d) fungi

Answer: algae

Question: When living tissue from a plant is extracted and placed in a medium, it is called ______

a) Explant

b) Transplantation

c) Horticulture

d) None of the above

Answer: Explant

Question: Vegetative propagation in Pistia occurs by

a) offset

b) sucker

c) runner

d) rhizome

Answer: offset

Question: Budding, in hydra, is a form ________

a) Asexual reproduction

b) None of the above

c) Sexual reproduction

d) Apoptosis

Answer: Asexual reproduction

Question: ____________is not a method of vegetative propagation

a) Lytic cycle

b) Layering

c) Cutting

d) Grafting

Answer: Lytic cycle

Question: Sugarcane is propagated by

a) stem cutting

b) leaf buds

c) root cutting

d) seeds

Answer: stem cutting

Question: ___________ refers to the process of asexual reproduction by multiplication of genetically identical copies of individual plants

a) Clonal Propagation

b) None of the above

c) Binary fission

d) Layering

Answer: Clonal Propagation

Question: A multicellular, filamentous alga exhibits a type of sexual life cycle in which the meiotic division occurs after the formation of zygote. The adult filament of this alga has

a) A multicellular, filamentous alga exhibits a type of sexual life

b) A multicellular, filamentous alga exhibits a type of sexual life

c) diploid vegetative cells and diploid gametangia

d) haploid vegetative cells and diploid gametangia

Answer: A multicellular, filamentous alga exhibits a type of sexual life 

Question: ________ shows totipotency.

a) Meristem

b) Xylem

c) Cork

d) All of the above

Answer: Meristem

Question: Offspring formed by sexual reproduction exhibit more variation than those formed by Asexual reproduction because

a) gametes of parents have qualitatively different genetic composition

b) gametes of parents have qualitatively different genetic composition

c) greater amount of DNA is involved in sexual reproduction

d) sexual reproduction is a lengthy process

Answer: gametes of parents have qualitatively different genetic composition

Question: The property of an undifferentiated cell that has the potential to develop into an entire plant is called

a) Totipotency

b) Subpotency

c) Cloning

d) Budding

Answer: Totipotency

Question: The development of root and shoot in tissue culture is determined by ______

a) Auxin and cytokinin ratio

b) None of the above

c) Nutrients

d) Temperature

Answer: Auxin and cytokinin ratio

Question: There is no natural death in single celled organisms like Amoeba and bacteria because

a) parental body is distributed among the offspring

b) they are microscopic

c) they reproduce by binary fission

d) they cannot reproduce sexually

Answer: parental body is distributed among the offspring

Question: There are various types of reproduction. The type of reproduction adopted by an organism depends on

a) the organism’s habitat, physiology, and genetic makeup

b) morphology and physiology of the organism

c) morphology of the organism

d) None of these

Answer: the organism’s habitat, physiology, and genetic makeup

Question: A few statements describing certain features of reproduction are given below:

i. Gametic fusion takes place

ii. Transfer of genetic material takes place

iii. Reduction division takes place

iv. Progeny have some resemblance with parents

Select the options that are true for both asexual and sexual reproduction from the options given below:

a) ii and iv

b) i and iii

c) ii and iii

d) i and ii

Answer: ii and iv

Question: Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because

a) nodes have meristematic cells

b) nodes have meristematic cells

c) nodes have meristematic cells

d) nodes are shorter than intemodes

Answer: nodes have meristematic cells

Question: Identify the correct sequence of events

a) Gametogenesis → Syngamy → Zygote

b) Gametogenesis → Embryogenesis → Zygote → Syngamy

c) Gametogenesis → Zygote → Syngamy → Embryogenesis

d) Gametogenesis → Syngamy Embryogenesis → Zygote

Answer: Gametogenesis → Syngamy → Zygote

Question: The term ‘clone’ cannot be applied to offspring formed by sexual reproduction because

a) Offspring do not possess exact copies of parental DNA

b) DNA of only one parent is copied and passed on to the offspring

c) Offspring are formed at different times

d) NA of parent and offspring are completely different

Answer: Offspring do not possess exact copies of parental DNA

Question: Amoeba and Yeast reproduce asexually by fission and budding respectively, because they are

a) Unicellular organisms

b) Uninucleate organisms

c) Heterotrophic organisms

d) Microscopic organisms

Answer: Unicellular organisms

Question: A few statements with regard to sexual reproduction are given below:

i. Sexual reproduction does not always require two individuals

ii. Sexual reproduction generally involves gametic fusion

iii. Meiosis never occurs during sexual reproduction

iv. External fertilisation is a rule during sexual reproduction

Choose the correct statements from the options below:

a) i and ii

b) ii and iii

c) i and iv

d) i and iv

Answer: i and ii

Question: A multicellular, filamentous alga exhibits a type of sexual life cycle in which the meiotic division occurs after the formation of zygote. The adult filament of this alga has

a) haploid vegetative cells and haploid gametangia

b) diploid vegetative cells and haploid gametangia

c) diploid vegetative cells and diploid gametangia

d) haploid vegetative cells and diploid gametangia

Answer: haploid vegetative cells and haploid gametangia

Question: The male gametes of rice plant have 12 chromosomes in their nucleus. The chromosome number in the female gamete, zygote and the cells of the seedling will be, respectively,

a) 12, 24, 24

b) 24, 12, 24

c) 24, 12, 12

d) 12, 24, 12

Answer: 12, 24, 24

Question: Given below are a few statements related to external fertilization. Choose the correct statements.

i. The male and female gametes are formed and released simultaneously

ii. Only a few gametes are released into the medium

iii. Water is the medium in a majority of organisms exhibiting external fertilization

iv. Offspring formed as a result of external fertilization have better chance of survival than those formed inside an organism

a) i and iii

b) ii and iv

c) i and iv

d) iii and iv

Answer: i and iii

Question: The statements given below describe certain features that are observed in the pistil of flowers.

i. Pistil may have many carpels

ii. Each carpel may have more than one ovule

iii. Each carpel has only one ovule

iv. Pistil have only one carpel

Choose the statements that are true from the options below:

a) i and ii

b) i and iii

c) ii and iv

d) iii and iv

Answer: i and ii