Reproduction in Organisms Class 12 Questions and Answers PDF Download
Reproduction is a biological process. There is a cycle of birth, growth and death. Reproduction enables the continuity of the species, generation after generation. Here we are going to discuss about Reproduction in Organisms Class 12 Questions and Answers. These Reproduction in Organisms Questions for NEET are compilation of previous years question paper of NEET, AIIMS, JIPMER and various other competitive medical entrance exam. These Reproduction in Organisms Questions and answers class 12 are the part of NCERT. Let’s go to the Reproduction in Organisms Question Bank.
1.
The property of an undifferentiated cell that has the potential to develop into an entire plant is called
Answer: Budding
2.
The development of root and shoot in tissue culture is determined by ______
Answer: Auxin and cytokinin ratio
5.
The rapid spreading of bread mould on slices of bread are due to:
(i) Presence of large number of spores in air
(ii) Presence of large number of thread-like branched hyphae
(iii) Presence of moisture and nutrients
(iv) Formation of round shaped sporangia
(i) Presence of large number of spores in air
(ii) Presence of large number of thread-like branched hyphae
(iii) Presence of moisture and nutrients
(iv) Formation of round shaped sporangia
Answer: (i) and (iii)
7.
Reason for the greater similarities among the offsprings produced by asexual reproduction, is:
(i) Asexual reproduction involves only one parent
(ii) Asexual reproduction involves two parents
(iii) Asexual reproduction involves gametes
(iv) Asexual reproduction does not involve gametes
(i) Asexual reproduction involves only one parent
(ii) Asexual reproduction involves two parents
(iii) Asexual reproduction involves gametes
(iv) Asexual reproduction does not involve gametes
Answer: (i) and (iv)
8.
The process of the division of cell into several cells during reproduction in Plasmodium is termed as:
Answer: Multiple fission
9.
The number of chromosomes in parents and offsprings of a particular species remains constant due to:
Answer: Halving of chromosomes during gamete formation
10.
A Planaria worm is cut horizontally in the middle into two halves P and Q such that the part P contains the whole head of the worm. Another Planaria worm is cut vertically into two halves R and S in such a way that both the cut pieces R and S contain half head each. Which of the cut pieces of the two Planaria worms could regenerate to form the complete respective worms?
Answer: P, Q, R and S
19.
The plants which bears two types of heterospores during Sporophytic stage is known as………
Answer: Heterosporous
21.
The number of chromosomes in both parents and offsprings of a particular species remains constant because:
Answer: Chromosomes get halved during gamete formation
22.
The figure given alongside shows the human male reproductive organs. Which structures make sperms and seminal fluid?
Answer: Y makes sperms and V makes seminal fluid
23.
An organism capable of reproducing by two asexual reproduction methods one similar to the reproduction in yeast and the other similar to the reproduction in Planaria is:
Answer: Hydra
24.
Among the following select the statements that are true regarding the sexual reproduction in flowering plants?
(i) Fertilisation is a compulsory event
(ii) It always results in the formation of zygote
(iii) Offsprings formed are clones
(iv) It requires two types of gametes
(i) Fertilisation is a compulsory event
(ii) It always results in the formation of zygote
(iii) Offsprings formed are clones
(iv) It requires two types of gametes
Answer: (i), (ii) and (iv)
25.
Which among the following are not the functions of testes at puberty?
(i) Formation of germ cells
(ii) Secretion of testosterone
(iii) Development of placenta
(iv) Secretion of estrogen
(i) Formation of germ cells
(ii) Secretion of testosterone
(iii) Development of placenta
(iv) Secretion of estrogen
Answer: (iii) and (iv)
26.
Which out of the following processes does not lead to the formation of clones:
Answer: Fertilisation
33.
Which part of the plant Bryophyllum performs vegetative reproduction ?
Answer: Buds on leaf margin
38.
Identify the mis-match statement regarding post fertilization events from the following statements.
Answer: Outer integument is converted into inner endocarp
40.
Choose the correct statement from amongst the following:
Answer: Dioecious organisms are seen in both plants and animals
51.
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:
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:
Answer: ii and iv
52.
The term ‘clone’ cannot be applied to offspring formed by sexual reproduction because:
Answer: Offspring do not possess exact copies of parental DNA
53.
Which of the following is a post-fertilisation event in flowering plants?
Answer: Embryo development
54.
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:
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:
Answer: i and ii
55.
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
Answer: haploid vegetative cells and haploid gametangia
56.
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
Answer: 12, 24, 24
57.
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
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
Answer: i and iii
58.
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:
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:
Answer: i and ii
59.
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
iv. Syngamy in both results in the formation of zygote Choose the correct answer from the options given below:
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
iv. Syngamy in both results in the formation of zygote Choose the correct answer from the options given below:
Answer: ii and iv
60.
Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because:
Answer: Nodes have meristematic cells
61.
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
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
Answer: ii and iv
62.
Offspring formed by sexual reproduction exhibit more variation than those formed by Asexual reproduction because:
Answer: Gametes of parents have qualitatively different genetic composition
66.
When living tissue from a plant is extracted and placed in a medium, it is called ______
Answer: Explant
69.
___________ refers to an asexual reproduction process wherein genetically identical copies of individual plants are produced
Answer: Clonal Propagation
NCERT Class 11 Biology Questions and Answers Downlaod
Categories: Biology, Chapter 1: Reproduction in Organisms, Class 12
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