MCQs for Class 10 Science Chapter 8 How do Organisms Reproduce?: In this article, we have covered all the important MCQs for Free for Class 10 Term 1 2021-22 Board Exams. In accordance with the latest pattern, Padhle is here with MCQ Questions for Class 10.

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Class 10 for MCQ Science Chapter 8 How do Organisms Reproduce?

Question 1:
During favourable conditions, Amoeba reproduces by
(a) multiple fission
(b) binary fission
(c) budding
(d) fragmentation

Answer: b) binary fission

Question 2:
In a list of organisms given below which is reproduced by asexual method ?
(a) Banana
(b) Yeast
(c) Dog
(d) lion

Answer: (b) Yeast

Question 3:
Hydra usually reproduces by:
(a) fragmentation and budding
(b) regeneration and budding
(c) multiple fission and fragmentation
(d) regeneration

Answer: (b) regeneration and budding

Question 4:
Which among the following is a unicellular organism that reproduces by budding:
(a) Hydra
(b) Planaria
(c) Yeast
(d) Spirogyra

Answer: (c) Spirogyra

Question 5:
 A feature of reproduction that is common to Amoeba, Yeast and Spirogyra is that
(a) they reproduce asexually
(b) they are all unicellular
(c) they reproduce only sexually
(d) they are all multicellular

Answer: (a) they reproduce asexually

Question 6:
Offsprings formed by asexual method of reproduction have greater similarity among themselves because_______.
(a) Asexual reproduction involves two parent
(b) Asexual reproduction does not involve gametes
(c) Asexual reproduction occurs before sexual reproduction
(d) Asexual reproduction occurs before sexual reproduction

Answer: (a) Asexual reproduction involves two parent

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Question 7:
Tubectomy is carried out by blocking the
(a) oviduct
(b) uterus
(c) cervix
(d) vagina

Answer: (a) oviduct

Question 8:
Which among the following does not reproduce by spore formation:
(a) Penicillium fungus
(b) Yeast fungus
(c) Micro fungus
(d) Rhizopus fungus

Answer. (b) Yeast fungus

Question 9:
The ability of a cell to divide into several cells during reproduction in Plasmodium is called
(a) budding
(b) multiple fission
(c) binary fission
(d) reduction division

Answer: (b) multiple fission

Question 10:
The correct sequence of reproductive stages seen in flowering plants is _______
(a) Gamete, zygote, embryo, seedling
(b) zygote, gamete, embryo, seedling
(c) seedling, embryo, zygote, gametes
(d) gamete, embryo, zygote , seedling

Answer: (a) Gamete, zygote, embryo, seedling

Question 11:
Variations occur as a result of
(a) asexual reproduction
(b) vegetative propagation
(c) sexual reproduction
(d) regeneration

Answer: (c) sexual reproduction

Question 12:
 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

(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (ii)
(d) (iii) and (iv)

Answer. (a) (i) and (iii)

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Question 13:
Bryophyllum can be propagated vegetatively by the
(a) stem
(b) leaf
(c) root
(d) flower

Answer: (b) leaf

Question 14:
The number of chromosomes present in parents and offspring of a particular species remains constant due to ________.
(a) doubling of chromosomes during zygote formation
(b) Halving of chromosomes during gamete formation
(c) Doubling of chromosomes after gamete formation
(d) Halving of chromosomes after gamete formation

Answer: (b) Halving of chromosomes during gamete formation

Question 15:
Fertilisation occurs in human female when the sperms and ovum reach simultaneously at
(a) fallopian tube
(b) uterus
(c) vagina
(d) cervix

Answer: (a) fallopian tube

Question 16:
The asexual reproduction in the Spirogyra involves:
(a) Breaking up of filaments into smaller bits
(b) Division of a cell into many cells
(c) Division of a cell into two cells
(d) Formation of a large number of buds

Answer. (b) Division of a cell into many cells

Question 17:
Vegetative propagation refers to formation of new plants from
(a) stem, flowers and fruits
(b) stem, leaves and flowers
(c) stem, roots and flowers
(d) stem, roots and leaves

Answer: (d) stem, roots and leaves

Question 18:
 In Rhizopus tubular structure bearing sporangia at their tips are called __________.
(a) filaments
(b) Rhizoids
(c) roots
(d) Hyphae

Answer: (d) Hyphae

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Question 19:
AIDS is a sexually transmitted disease caused due to an infection by a
(a) bacteria
(b) protozoa
(c) virus
(d) Plasmodium

Answer: (c) virus

Question 20:
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

(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) (i) and (iv)

Answer. (d) (i) and (iv)

Question 21:
 In a potato, vegetative propagation takes place by:
(a) root
(b) leaf
(c) stem tuber
(d) grafting

Answer: (c) stem tuber

Question 22:
 Which among the following is not the function of testis at puberty ?
(a) Formation of sperms
(b) Releasing testosterone
(c) ovulation
(d) release of seminal fluid

Answer: (c) ovulation

Question 23:
In the list of organisms given below, those that reproduce by the asexual method are
{i) banana
(ii) dog
(iii) yeast
(iv) Amoeba

(a) (ii) and (iv)
(b) (i), (iii) and (iv)
(c) (i) and (iv)
(d) (ii), (iii) and (iv)

Answer:  (b) (i), (iii) and (iv)

Question 24:
The process of the division of cell into several cells during reproduction in Plasmodium is termed as:
(a) Fragmentation
(b) Budding
(c) Multiple fission
(d) Binary fission

Answer. (c) Multiple fission

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Question 25:
Vegetatively propagated plants
(a) do not bear roots
(b) do not bear buds
(c) are genetically similar
(d) are genetically dissimilar

Answer: (c) are genetically similar

Question 26:
 Length of the pollen grain depends upon the distance between ________.
(a) pollen grain and upper surface of stigma
(b) pollen grain on upper surface of stigma and ovule
(c) pollen grain in anther and upper surface of stigma
(d) upper surface of stigma and lower part of style

Answer: (b) pollen grain on upper surface of stigma and ovule

Question 27:
Which of the following is the correct sequence of events of sexual reproduction in a flower?
(а) pollination, fertilisation, seedling, embryo
(b) seedling, embryo, fertilisation, pollination
(c) pollination, fertilisation, embryo, seedling
(d) embryo, seedling, pollination, fertilisation

Answer: (c) pollination, fertilization, embryo, seedling

Question 28:
The number of chromosomes in parents and offspring of a particular species remains constant due to:
(a) Doubling of chromosomes after zygote formation
(b) Halving of chromosomes during gamete formation
(c) Doubling of chromosomes after gamete formation
(d) Halving of chromosomes after gamete formation

Answer. (b) Halving of chromosomes during gamete formation

Question 29:
 Spirogyra reproduce by
(a) budding
(b) fragmentation
(c) regeneration
(d) fission

Answer: (b) fragmentation

Question 30:
The ability of cell to divide into several cells during reproduction in plasmodium is called __________.
(a) budding
(b) reproductive division
(c) Multiple fission
(d) Binary fission

Answer: (c) Multiple fission

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Question 31:
Offspring formed by asexual method of reproduction have greater similarity among themselves because
(i) asexual reproduction involves only one parent
(ii) asexual reproduction does not involve gametes
(iii) asexual reproduction occurs before sexual reproduction
(iv) asexual reproduction occurs after sexual reproduction
(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) (iii) and (iv)

Answer: (a) (i) and (ii)

Question 32:
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?
(a) Only P
(b) Only R and S
(c) P, Rand S
(d) P, Q, R and S

Answer. (d) P, Q, R and S

Question 33:
In Rhizopus, tubular thread like structures bearing sporangia at their tips are called
(a) filaments
(b) hyphae
(c) rhizoids
(d) roots

Answer: (b) hyphae

Question 34:
Asexual reproduction takes place through budding in _______.
(a) Amoeba
(b) yeast
(c) plasmodium
(d) leishmania

Answer: (a) Amoeba

Question 35:
Characters that are transmitted from parents to offspring during reproduction show
(a) only similarities with parents
(b) only variations with parents
(c) both similarities and variations with parents
(d) neither similarities nor variations

Answer: (c) both similarities and variations with parents

Question 36:
The number of chromosomes in both parents and offsprings of a particular species remains constant because:
(a) Chromosomes get doubled after zygote formation
(b) Chromosomes get doubled after gamete formation
(c) Chromosomes get halved during gamete formation
(d) Chromosomes get halved after gamete formation

Answer. (c) Chromosomes get halved during gamete formation

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Question 37:
Plants like banana, rose, jasmine, orange have lost the capacity to produce
(a) seeds
(b) buds
(c) flower
(d) roots

Answer: (a) seeds

Question 38:
The anther contains ________.
(a) sepals
(b) ovules
(c) carpel
(d) pollens

Answer: (d) pollens

Question 39:
In Spirogyra, asexual reproduction takes place by
(a) breaking up of filaments into smaller bits
(b) division of a cell into two cells
(c) division of a cell into many cells
(d) formation of young cells from older cells.

Answer: (a) breaking up of filaments into smaller bits

Question 40:
The figure given alongside shows the human male reproductive organs. Which structures make sperms and seminal fluid?
(a) V makes sperms and X makes seminal fluid
(b) W makes sperms and Y makes seminal fluid
(c) X makes sperms and W makes seminal fluid
(d) Y makes sperms and V makes seminal fluid

Answer. (d) Y makes sperms and V makes seminal fluid

Question 41:
The flower of the Hibiscus plant is
(a) bisexual
(b) unisexual
(c) neuter
(d) very small

Answer: (a) bisexual

Question 41:
In human females, an event that reflects onset of reproductive phase is :
(a) Growth of body
(b) change in voice
(c) changes in hair pattern
(d) menstruation

Answer: (d) menstruation

Question 42:
The ability of a cell to divide into several cells during reproduction in Plasmodium is called
(a) budding
(b) reduction division
(c) binary fission
(d) multiple fission

Answer: (d) multiple fission

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Question 43:
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:
(a) Spirogyra
(b) Hydra
(c) Bryophyllum
(d) Paramecium

Answer. (b) Hydra

Question 44:
The part of the flower which is present in the center of the flower is
(a) Sepals
(b) Petals
(c) Carpels
(d) Stamens

Answer: (c) Carpels

Question 45:
Which among the following is not sexually transmitted?
(a) AIDS
(b) hepatitis
(c) Syphilis
(d) Gonorrhoeic

Answer: (b) hepatitis

Question 46:
The correct sequence of reproductive stages seen in flowering plants is
(а) gametes, zygote, embryo, seedling
(b) zygote, gametes, embryo, seedling
(c) seedling, embryo, zygote, gametes
(d) gametes, embryo, zygote, seedling

Answer: (а) gametes, zygote, embryo, seedling

Question 47:
Among the following select the statements that are true regarding the sexual reproduction in flowering plants?
(i) Fertilization is a compulsory event
(ii) It always results in the formation of zygote
(iii) Offspring formed are clones
(iv) It requires two types of gametes

(a) (i) and (iv)
(b) (i), (ii) and (iii)
(c) (i), (ii) and (iv)
(d) (ii), (iii) and (iv)

Answer. (c) (i), (ii) and (iv)

Question 48:
The seed that contains the future plant is called the
(a) cotyledons
(b) seed coat
(c) germ cells
(d) embryo

Answer: (d) embryo

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Question 49:
Which of the following is not the part of female reproductive system?
(a) ovary
(b) fallopian tube
(c) uterus
(d) vas deferens

Answer: (d) vas deferens

Question 50:
The number of chromosomes in parents and offsprings of a particular species remains constant due to
(a) doubling of chromosomes after zygote formation
(b) halving of chromosomes during gamete formation
(c) doubling of chromosomes after gamete formation
(d) halving of chromosomes after gamete formation

Answer: (b) halving of chromosomes during gamete formation

Question 51:
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

(a) (i) and (ii)
(b) (i) and (iii)
(c) (ii) and (iv)
(d) (iii) and (iv)

Answer. (d) (iii) and (iv)

Question 52:
The period of pregnancy is called
(a) gestation period
(b) incubation period
(c) ovulation
(d) menstruation period

Answer: (a) gestation period

Question 53:
 During adolescence, several changes occur in human body. Mark one change that is associated with sexual maturity in boys?
(a) loss of milk teeth
(b) increase in height
(c) weight gain
(d) cracking of voice

Answer: (d) cracking of voice

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Question 54:
Factors responsible for the rapid spread of bread mould on slices of bread are
(i) large number of spores
(ii) availability of moisture and nutrients in bread
(iii) presence of tubular branched hyphae
(iv) formation of round shaped sporangia
(a) (i) and (iii)
(b) (ii) and (iv)
(c) (i) and (ii)
(d) (iii) and (iv)

Answer: (c) (i) and (ii)

Question 55:
Which out of the following processes does not lead to the formation of clones:
(a) Fertilizations
(b) Fission
(c) Tissue culture
(d) Fragmentation

Answer. (a) Fertilizations

Question 56:
Length of pollen tube depends on the distance between
(a) pollen grain and upper surface of stigma
(b) pollen grain on upper surface of stigma and ovule
(c) pollen grain in anther and upper surface of stigma
(d) upper surface of stigma and lower part of style

Answer: (b) pollen grain on upper surface of stigma and ovule

Question 57:
Which of the following statements are true for flowers?
(i) Flowers are always bisexual
(ii) They are the sexual reproductive organs
(iii) They are produced in all groups of plants
(iv) After fertilisation they give rise to fruits

(a) (i) and (iv)
(b) (ii) and (iii)
(c) (i) and (iii)
(d) (ii) and (iv)

Answer: (d) (ii) and (iv)

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Question 58:
The ratio of number of chromosomes in a human zygote and a human sperm is:
(a) 2 : 1
(b) 3 : 1
(c) 1 : 2
(d) 1 : 3

Answer. (a) 2 : 1

Question 59:
The process of release of eggs from the ovary is called
(a) menstruation
(b) reproduction
(c) insemination
(d) ovulation

Answer: (d) ovulation

Question 60:
In human beings, the fertilization occurs in the
(a) uterus
(b) ovaries
(c) fallopian tubes
(d) vagina

Answer: (c) fallopian tubes

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