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NEET Biology MCQ
Reproduction In Organisms Mcq
Quiz 6
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Q.1
n sugarcane, the lower ends of cuttings are often dipped in IBA prior to sowing to promote:
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a) Rooting
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b) Increase in number of shoot buds
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c) Sprouting of shoot buds
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d) None of these
Explanation
IBA-derived auxin has strong roles in various aspects of root development, including regulation of root apical meristem size, root hair elongation, lateral root development, and formation of adventitious roots. Sugar canes ends after they are cut are dipped into IBA prior to sowing to promote root development. Answer:(a)
Q.2
hat are ciliated spore?
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a) Non-motile spores
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b) Zoospores
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c) Homospores
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d) Heterospores
Explanation
Ciliated spore: An asexual sporangial spore, esp. of certain fungi or algae, capable of independent motion usually by means of cilia or flagella. A zoospore is a motile asexual spore that uses a flagellum for locomotion. Answer:(b)
Q.3
ow many chromosomes are there in meiocyte of Apple?
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a) 17
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b) 34
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c) 20
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d) 10
Explanation
In diploid organisms, specialised cells called meiocytes (gamete mother cell) undergo meiosis Apple: 34 Answer:(b)
Q.4
or which plants layering method of vegetative propagation is used?
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a) Lemon, guava
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b) Sugarcane, Rose
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c) Mango, Apple
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d) Guava, Litchi
Explanation
Layering is used as a method of vegetative propagation for lemon, guava, Hibiscus, jasmine, Bougainvillaea Answer:(a)
Q.5
ormally Female gametes are.... .
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a) Stationary
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b) Ordinary
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c) Nutritive
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d) Motile
Explanation
In a majority of organisms, male gamete is motile and the female gamete is stationary. Answer:(a)
Q.6
he fertilized eggs of reptile and birds are covered with calcareous shell. Due to this the zygote passes from which phase ?
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a) Growth phase
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b) Vegetative phase
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c) Development phase
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d) Incubation phase
Explanation
In oviparous animals like reptiles and birds, the fertilised eggs covered by hard calcareous shell are laid in a safe place in the environment; after a period of incubation young ones hatch out. Answer:(d)
Q.7
hich type of asexual reproduction takes place in sycon and spongilla ?
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a) Exo budding
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b) Endo budding
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c) Fragmentation
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d) Division
Explanation
Both Spongilla and sycon shows internal or endogenous budding. It is the type of asexual reproduction where individual daughter buds are developed in a mass of cells and gets released after germination. Answer:(b)
Q.8
hich type of division happens in Euglena?
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a) Transversal
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b) Longitudinal
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c) Peripheral
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d) Radial
Explanation
Answer:(b)
Q.9
hich structure provides surface for the settlement of pollen grains in angiosperm plants?
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a) Anther
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b) Style
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c) Stigma
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d) Pollen tube
Explanation
Answer:(c)
Q.10
ssertion: Hydra possess exogenous budding method. Reason: Exogenous bud develops in hydra which directs asexually reproduction.
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a) Assertion is true and Reason is false
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b) Assertion is false and Reason is true
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c) Assertion and Reason both are true and Reason is correct explanation of Assertion
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d) Assertion and Reason both are true but Reason is not correct explanation of Assertion
Explanation
Exogenous budding is a type of asexual reproduction shown by certain living organisms. In this process, a new organism develops as a form of an outgrowth or a bud on the surface of the mother cell. It develops externally on the mother parent. Examples- Hydra, yeast. Reason is correct explanation of assertion. Answer:(c)
Q.11
atch the appropriate pairs.
Column - I
Column - II
(P) Dahlia
(i) Axillary bud
(Q) Turmeric
(ii) Buds on the margin of leaf
(R) Bryophyllum
(iii) Floral bulb
(S) Oxalis
(iv) Rhizome
(T) Discoria
(v) Cluster of tuberous root
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a) P-i, Q-ii,R-iii, S-iv, T-v
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b) P-v, Q-iv, R-iii, S-ii, T-i
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c) P-ii, Q-iii, R-iv, S-v, T-i
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d) P-v, Q-iv, R-ii,S-iii, T-i
Explanation
Organism
Vegetative propagules
Dahlia
Cluster of tuberous root
Turmeric
Rhizome
Bryophyllum
Buds on the margin of leaf
Oxalis
Floral bulb
Discoria
Axillary tubers called bubils
Answer:(d)
Q.12
n a given figure which type of asexual reproduction take place?
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a) Fission
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b) Binary fission
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c) Transverse binary fission
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d) longitudinal binary fission
Explanation
Transverse Binary Fission: It is a common method of reproduction in Paramecium which occurs during favourable condition. A fully grown Paramecium is divided into two daughter individuals. Division occurs at the right angle to the longitudinal axis of the body. Nuclear division is followed by the cytoplasmic division. Answer:(c)
Q.13
ollen tube enters the embryo sac through
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a) Any one synergid cell
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b) Directly penetrating the egg cell
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c) In between one synergid cell and secondary nucleus
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d) The help of antipodal cells
Explanation
Pollen tube, after reaching the ovary, enters the ovule through the micropyle and then enters the embryo sac through one of the synergids. The synergids have special cellular thickenings at the micropylar tip called filiform apparatus, which plays an important role in guiding the pollen tube. Answer:(a)
Q.14
dentify the mis-match statement regarding post fertilization events from the following statements.
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a) Wall of ovary is converted in to pericarp
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b) Outer integument is converted in inner integument
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c) Triploid nucleus develops as endosperm
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d) Ovary is developed as fruit
Explanation
In flowering plants, the zygote is formed inside the ovule. Along the zygote, triple fusion occurs which develops as endosperm. After fertilisation the sepals, petals and stamens of the flower wither and fall off. The pistil however, remains attached to the plant. The zygote develops into the embryo and the ovules develop into the seed. The ovary develops into the fruit and wall of ovary develops a thick wall called pericarp that is protective in function. Answer:(b)
Q.15
f primary spermatocyte have 2n=16 chromosomes during first meiotic division ,in such case how many chromatids could be present in each secondary spermatocyte?
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a) 32
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b) 8
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c) 16
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d) 24
Explanation
Meiosis of primary spermatocyte (2n) produces secondary spermatocyte (n) where n = number of chromosomes. Thus n in secondary spermatocyte is 8. There are two sister chromatids in each chromosomes. Thus, 8 chromosomes will have = 2 ✗ 8 = 16 Answer:(c)
Q.16
ssertion: Most of the plants are bisexual whereas most of the animals are unisexual. Reason: In all organisms, gametes are formed through meiosis.
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a) Both Assertion and Reason are true and Reason is the correct explanation of Assertion
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b) Both Assertion and Reason are true but Reason is NOT the correct explanation of Assertion
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c) Assertion is true but Reason is false
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d) Both Assertion and Reason are false
Explanation
Assertion is true. Gametes are haploid in nature and usually a direct product of meiotic division except in haploid organisms where gametes are formed by mitosis. Reason is false. Answer:(c)
Q.17
amboo species is:
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a) Annual monocarpic
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b) Biennial monocarpic
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c) Perennial monocarpic
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d) Perennial polycarpic
Explanation
bamboo species flower only once in their life time, generally after 50-100 years, produce large number of fruits and die. Bamboos exhibit monocarpic flowering behaviour and are perennial. Answer:(c)
Q.18
atch the column I with column II:
Column I (Organism)
Column II (Chromosome number in meiocyte)
a. Dog
380
b. Potato
78
c. Maize
48
d. Butterfly
20
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a) a=1, b=2, c=3, d=4
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b) a=2, b=4, c=3, d=1
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c) a=2, b=3, c=4, d=1
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d) a=4, b=2, c=3, d=1
Explanation
Organism
Chromosome number in meiocyte
Dog
78
Potato
48
Maize
20
Butterfly
380
Answer:(c)
Q.19
dentify the correct statement:
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a) Gametes in heterogametic species are diploid
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b) Meiosis takes place both in haploid and diploid organisms
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c) Meiosis, the reduction division occurs in a haploid body has to produce diploid gametes
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d) At the end of meiosis, only two set of chromosomes gets incorporated into each gametes in a diploid organism
Explanation
Gametes are haploid though the parent plant body from which they arise may be either haploid or diploid. (a) is incorrect. Meiosis, the reduction division, has to occur if a diploid body has to produce haploid gametes. (c) is incorrect. At the end of meiosis, only one set of chromosomes gets incorporated into each gamete. (d) is incorrect. In some haploid orgainsms undergoing sexual reproduction, two haploid gametes fuse to give rise to diploid zygote. The zygote then undergoes meiosis to produce haploid organism. (b) is correct. Answer:(b)
Q.20
hich root will form a new plant?
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a) Sweet potato.
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b) Dahlia
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c) Potato
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d) Both A and B
Explanation
The vegetative propagation of dahlia is done by tuberous roots. Tuberous roots have abundant storage of reserved food material. Sweetpotato is cultivated by vegetative propagation. Growers take stem cuttings from the vines, which then root and form new storage roots. Answer:(d)
Q.21
n this method Parents cell divides into many daughter cells.
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a) Fission
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b) Binary fission
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c) Multiple fission
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d) Budding
Explanation
Multiple fission is the process of asexual reproduction in which many daughter cells are produced from the parent cell. In this, the nucleus undergoes repeated division to produce a large number of nuclei. Each nucleus along with little bit of cytoplasm forms a membrane around it. Answer:(c)
Q.22
n yeast cell division results in a small cell called
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a) off spring
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b) bud
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c) clone
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d) branch
Explanation
Budding is a form of asexual reproduction in which a new individual develops from some generative anatomical point of the parent organism. Yeast cells reproduce asexually by an asymmetric division process called budding. In yeast, budding usually occurs during the abundant supply of nutrition. In this process of reproduction, a small bud arises as an outgrowth of the parent body. Answer:(b)
Q.23
f the gametes are similar in their appearance they are called as
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a) anisogametes
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b) isogametes
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c) Homogametes
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d) Both c and b
Explanation
Two gametes are so similar in appearance that it is not possible to categorise them into male and female gametes. They are hence called homogametes (isogametes) Answer:(d)
Q.24
onoecious plant of Chara shows occurrence of:
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a) Antheridiophore and Archegoniophore on the same plant
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b) stamen and carpel on the same plant
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c) upper antheridium and lower oogonium on the same plant
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d) upper oogonium and lower antheridium on the same plant
Explanation
Monoecious or homothallic condition in Chara (green algae) is used to denote upper oogonium and lower antheridium on the same plant. Answer:(d)
Q.25
hich plant performs vegetative reproduction with the help of floral buds?
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a) Agave
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b) Bryophyllum
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c) Ginger
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d) Asparagus
Explanation
Asparagus propagation by division is one of the most common methods. Propagation Ginger is vegetatively propagated from small sections of the rhizome, called sets. The leaves of a Bryophyllum plant have special buds in their margins which may get detached from the leaves, fall to the ground and then grow to produce a new plant. Vegetative reproduction in Agave occurs through bulbils. Bulbils are the specialised buds vegetative or floral that modify into a swollen structure. Answer:(a)
Q.26
n which animal formation of exogenous budding takes place from parent body ?
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a) Hydra
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b) Planaria
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c) Amoeba
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d) Paramecium
Explanation
Planaria, amoeba and paramecium reproduce by binary fission. Hydra undergoes exogenous budding. In hydra, a bud develops as an outgrowth due to repeated cell division at one specific site. These buds develop into tiny individuals and after full maturation get detached from the parent body and become new independent individuals. Answer:(a)
Q.27
on-motile and non-flagellate spores are commonly seen in which plants?
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a) Penicillium
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b) Aspergillus
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c) Mucor
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d) Both a and b
Explanation
Chains of spores produced from cells called phialides are very common among ascomycetes, including Aspergillus and Penicillium. Phialides are vase-shaped cells (shaped, more explicitly, like a Greek amphora), that develop on conidiophores. Both of these produces sproes called conidia which is non-motile and non-flagellated. Answer:(d)
Q.28
hich of the following group of animals show regeneration?
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a) Planaria, Hydra, Starfish
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b) Starfish, Amoeba, Plasmodium
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c) Amoeba, Hydra, Paramecium
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d) Amoeba, Planaria, Starfish
Explanation
Regeneration is the natural process of replacing or restoring damaged or missing cells, tissues, organs, and even entire body parts to full function in plants and animals. Most common example are planaria, starfish, lizards, hydra. Answer:(a)
Q.29
hich organisms have haploid body organization?
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a) Monera and Fungi
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b) Algae and Bryophyte
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c) Pteridophytes and Angiosperms
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d) Both a and b
Explanation
Haploid Organism: These are the individuals which have one and only arrangement of chromosomes in somatic cells. Examples include Algae, Fungi, Monera, bryophytes has haploid plant body. Answer:(d)
Q.30
n asexual reproduction embryo sac develop from which part?
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a) Pollen grain
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b) Ovum
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c) Ovary
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d) Mother megaspore
Explanation
In gametophytic apomixis, an unreduced embryo sac develops from the megaspore mother cell by circumvention of meiosis (Diplospory) or directly from a cell in the nucellus (Apospory). Answer:(d)
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