MCQ Chapter-1 Biology, Class 12 Reproduction in Organism -

CBSE MCQ CLASS 12 Chapter 1

BIOLOGY : REPRODUCTION IN ORGANISM

Q.1

Which of the following groups is formed only of the hermaphrodite organisms?
(a) Earthworm, tapeworm, housefly, frog
(b) Earthworm, tapeworm, sea horse, housefly
(c) Earthworm, leech, sponge, roundworm
(d) Earthworm, tapeworm, leech, sponge

Q.2

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

Sexual reproduction is a lengthy process
Gametes of parents have qualitatively different genetic composition
Genetic material comes from parents of two different species
Greater amount of DNA is involved in sexual reproduction

Q3.

Which of the following options shows bisexual animals only?
(a) Amoeba, sponge, leech
(b) Sponge, cockroach, Amoeba
(c) Earthworm, sponge, leech
(d) Tapeworm, earthworm, honeybee

Q.4

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

a. ii and iv (b) iv only (c) ii and iv (d) i and iv

Q.5.

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

Nodes are shorter than internodes
Nodes have meristematic cells
Nodes are located near the soil
Nodes have non-photosynthetic cells

Q.6

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:

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

Q7.
Read the following statements and select the incorrect one.
(a) Cucurbits and coconuts are monoecious plants.
(b) Papayas and date palms are dioecious plants.
(c) Leeches and tapeworms are bisexual animals.
(d) Sponges and coelenterates are unisexual animals.

Q.8
Meiosis does not occur in
(a) asexually reproducing diploid individuals
(b) sexually reproducing haploid individuals
(c) sexually reproducing diploid individuals
(d) all of these.
Q.9.

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

Q.10

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

Q11.
Which of the following organisms has the highest number of chromosomes?
(a) Housefly
(b) Butterfly
(c) Ophioglossum
(d) Onion

Q12.
In maize, a meiocyte has 20 chromosomes. What will be the number of chromosomes in its somatic cell?
(a) 40
(b) 30
(c) 20

Q13.

Asexual reproductive structure of sponge:

(a) Gemmules

(b)conidia

(c)bulb

(d)none of these

Q.14.

Which of the following is developed by parthenogenesis:

(a)Drones

(b)queen honey bee

c)worker honey bee

d) both b and c

Q.15.

—– is formed immediately after fertilization (

a) morula (b)blastula (c)zygote (d) foetus

Q16.

The process which results the formation of zygote

(a) Isogamy (b) Anisogamy (c) Triple fusion (d) Syngamy

Q17.
A diploid parent plant body produces ________ gametes and a haploid parent plant body produces ________ gametes.
(a) diploid, haploid
(b) haploid, diploid
(c) diploid, diploid
(d) haploid, haploid

Q18.

Which of the following is not an asexual reproductive structure? (

a) zoospores (b) pollen (c) buds (d) conidia

Q.19.

Parthenogenesis is the development of an organism directly from:

(a) Female gametes (b) Vegetative cells (c) Fertilized ovum (d)none of these

Q20

Which of the following organism reproduces by multiple fission?

Euglena (b) Paramecium (c)Trypanosoma (d)Plasmodium

Q 19.
If a butterfly has chromosome number 360 in its meiocyte (2n). What will be the chromosome number in its gametes?
(a) 380
(b) 190
(c) 95
(d) 760
Q.20.
In flowering plants, both male and female gametes are non-motile. The method to bring them together for fertilisation is
(a) water
(b) air
(c) pollination
(d) apomixes

Q21.
In which of the following plants, sepals do not fall off after fertilisation and remain attached to the fruit?
(a) Brinjal
(b) Cucumber
(c) Papaya
(d) Bitter gourd

Which type of stem modification is seen in banana?

(a) stem tuber (b) bulb (c)corn (d) rhizome

Q23.

Which animals have developed capacity of regeneration ?

(a) Hydra, Starfish (b) Plasmodium (c) Leech (d) Paramoecium

Q.24.

Sporulation occurs in………..

(a) Plasmodium (b) Hydra (c) Starfish (d) Spongilla

Q.25

Which plant reproduces vegetatively by roots ?

(a) Oxalis (b) Bryophyllum (c) Onion (d) Dahlia

Q.26

Which plant performs vegetative reproduction with the help of floral buds ?

(a) Agave (b) Bryophyllum (c) Ginger (d) Asparagus

Q27.
The wall of the ovary forms
(a) pericarp
(b) fruit wall
(c) fruit
(d) both (a) and (b).

Q28.
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) DNA of parent and offspring are completely different

Q29.
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) 12,24,12
(b) 24,12,12
(c) 12, 24, 24
(d) 24, 12, 24.

Q30.
Appearance of vegetative propagules from the nodes of plants such as sugarcane and ginger is mainly because
(a) nodes are shorter than intemodes
(b) nodes have meristematic cells
(c) nodes are located near the soil
(d) nodes have non-photosynthetic cells.

Q31. Which part of the plant Bryophyllum performs vegetative reproduction ?

(a) Stem (b) Floral buds (c) Underground roots (d) Buds on leaf margin

Q32.

Juvenile phase represents the period of-

Growth b. Death c. Birth d. None

Q33.

Either male or female reproductive organs are found in the body

a. Monoecious b. Dioecious c. Meiocyte d. Syngamy

Q34.

Propagules are used to raise—

a.growth b. new plants c. old plants d. all the above.

Q35

Find the monoecious plant

a.Coconut b. Cucurbits c. Both a and b d. Papaya

Q.36

Identify the mis-match statement regarding post fertilization events from the following statements.

(a) Wall of ovary is converted into pericarp.

(b) Outer integument is converted into inner endocarp

(d) Ovary is developed as fruit.

Q.37.

In these organisms, gametes are released in the surrounding medium

a.Fishes b. Amphibians c. Mammals d. Both a and b

Q38

Choose the correct statement from amongst the following:

Dioecious (hermaphrodite) organisms are seen only in animals
Dioecious organisms are seen only in plants
Dioecious organisms are seen in both plants and animals
Dioecious organisms are seen only in vertebrates

Q39.
There is no natural death in single celled organisms like Amoeba and bacteria because
(a) they cannot reproduce sexually
(b) they reproduce be binary fission
(c) parental body is distributed among the offspring
(d) they are microscopic.

Q40.
There are various types of reproduction. The type of reproduction adopted by an organism depends on
(a) the habitat and morphology of the organism
(b) morphology of the organism
(c) morphology and physiology of the organism
(d) the organisms habitat, physiology and genetic makeup.

Q41.
Which of the following is a post-fertilisation event in flowering plants?
(a) Transfer of pollen grains
(b) Embryo development
(c) Formation of flower
(d) Formation of pollen grains

Q42.
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

Q43

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

a.They cannot reproduce sexually b. They reproduce by binary fission

c. They are not diploid d. They are microscopic

Q.44

Amoeba reproduces by-

(a) Binary fission (b) Budding (c) Sporulation (d) Both a and c

Q.45

What are ciliated spores ?

(a) Non-motile spores (b) Zoospores (c) Homospores (d) Heterospores

Q46.

Non-flagellated spores are called conidia . In which organism they are seen ?

(a) Pencillium (b) Hydra (c) Amoeba (d) Chlamydomonas

Q47.

Which animals reproduce by exogenous budding ? (a) Hydra (b) Spongilla (c) Plasmodium (d) Amoeba

Q48.

Some unicellular organisms shift to sexual method of reproduction , before the onset of adverse conditions, because

a)Sexual reproduction is a simple method b)it involves gamets c) Survival chances are more in sexual reproduction due to variations d) None of these

Q49.

During which process cyst is formed ? (a) Binary fission (b) Multiple fission (c) Sporulation (d) Budding

Q50

In which method of reproduction, pseudopodiospores are formed ? (a) Binary fission (b) Multiple fission (c) Sporulation (d) Budding

Q51.

Antherozoids are the gamets formed ina) Algae b) Bryophytes c) Pteridophytes d) Both b and c

Q52. During which process cyst is formed ? (a) Binary fission (b) Multiple fission (c) Sporulation (d) Budding

Q53. In which method pseudopodiospores are formed ? (a) Binary fission (b) Multiple fission (c) Sporulation (d) Budding

Q54. In which organism multiple fission is seen ? (a) Paramoecium (b) Plasmodium (c) Hydra (d) Planaria