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NEET Biology MCQ
Reproduction In Organisms Mcq
Quiz 5
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Q.1
he most significant value of vegetative propagation is that:
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a) It is a means of producing a large population or individuals genetically identical to the parent
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b) It enables production of genetic variation
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c) It is an ancient practise
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d) It ensures that the progeny are safe from attack of diseases and pests
Explanation
Adavntages of vegetative propagation: (i) The plants that cannot produce viable seeds such as banana, seedless grapes and oranges, etc, can be easily grown by vegetative propagation. (ii) It is an easier, less expensive and a rapid method of propagation. (iii) Genetically identical plants can be produced. Answer:(a)
Q.2
dentify the given figures and choose the correct statements (i) Figure A represents zoospores in Chlamydomonas which is endogenous and figure B represents Conidiospores in Penicillium which is exogenous. (ii) The reproductive structure shown in figure A is motile while that in figure B is non – motile. (iii) Figure D shows internal buds which is common in all fresh water sponges except Spongilla. (iv) In Figure D the internal buds are surrounded by a resistant Chitinous covering. (v) Figure C shows budding in hydra which is also called torulation due to its unequal division. (vi) A and B are fungal species, C a comb jelly and D a sponge.
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a) (i), (ii), (iii), (v) and (vi) are true while (iv) is false
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b) (i), (ii) and (iv) are true while (iii), (v) and (vi) are false
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c) (i), (ii), (iv) and (vi) are true while (iii) and (v) are false
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d) All statements are true
Explanation
The following diagram shows asexual reproductive structures of different organism. (A) Zoospores of Chlamydomonas. Zoospores are endogenous. (B) Conidia of Penicillium. Exogenous spores or conidia are spores that are formed externally or exogenously. (C) Buds in Hydra (D) Gemmules in sponge. These gemmules are tough and coated with a thick solid chitin. Answer:(b)
Q.3
uds develops in Bryophyllum daigremonthianum:
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a) From marginal notches when leaf falls on the ground
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b) From marginal notches while leaf is attached to the plant
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c) From the marginal notches of leaves of another plant
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d) From the site of injury
Explanation
Bryophyllum can be reproduced by vegetative propagation by using leaves. 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. Answer:(a)
Q.4
ericarp is the ------ of the fruit
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a) leaf
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b) wall
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c) stem
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d) root
Explanation
Pericarp: It is the wall of a fruit, developed from the ovary wall. Answer:(b)
Q.5
ll individuals produced are genetically identical
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a) clone
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b) off spring
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c) fission
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d) monoecious
Explanation
The term clone is used to describe morphologically and genetically similar individuals. Answer:(a)
Q.6
n this plant, the site of origin of new plants is node.
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a) Potato tuber
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b) Onion bulb
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c) Rhizome ginger
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d) All the above
Explanation
The tuber, bulb and rhizome are all modifications of stem. They have nodes and internodes. Tuber is obtained in potato, rhizomes is seen in ginger and bulb is observed in onion. Answer:(d)
Q.7
Find the monoecious plant
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a) Coconut
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b) Cucurbits
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c) Both a and b
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d) Papaya
Explanation
papaya and date palm both are dioecious because these plants bears exclusively either male flowers or female flowers. Cucurbits and coconut palms are said to be monoecious, because both male and female flowers are borne on the same plant. Answer:(c)
Q.8
evelopment of zygote depends on
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a) Life cycle of the organism
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b) Environment it is exposed to
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c) Both a and b
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d) None of the above
Explanation
The development of zygote depends on the type of life cycle of the organism and the nature of environment. Answer:(c)
Q.9
porulation occurs in...........
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a) Plasmodium
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b) Hydra
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c) Starfish
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d) Spongilla
Explanation
Hydra reproduces asexually by budding. Sporulation occurs in Plasmodium. Spongilla reproduces asexually through gemmules. Asexual reproduction in starfish takes place by fission or through autotomy of arms. Answer:(a)
Q.10
hich animals reproduce by exogenous budding ?
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a) Hydra
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b) Spongilla
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c) Plasmodium
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d) Amoeba
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. Hence, it is known as exogenous budding. Exogenous budding is commonly seen in hydra, obelia, scypha, and yeast. Asexual structures for other are as follows:(a)gemmules of spongilla (b)spores of plasmodium (c) fission of amoeba. Answer:(a)
Q.11
y which asexual reproductive method do Dictyota, Fucus and Yeast reproduces ?
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a) Budding
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b) Sporulation
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c) Fragmentation
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d) Fission
Explanation
Dictyota: Asexual reproduction takes place with the help of large, non- motile spores. Yeast usually asexually reproduce by a method called budding. None of these options are fully correct. Answer:(a)
Q.12
n Which plant stem is used for vegetative propagation of the plant ?
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a) Lemon, grapes
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b) Hibiscus, mogra
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c) Sugarcane, rose
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d) Mango, apple
Explanation
Propagation Sugarcane is vegetatively propagated by planting part of a mature cane called “setts”. Stem Cutting Propagation is also followed in rose. Answer:(c)
Q.13
n plants, the phase from germination to grow till its maturity is known as ?
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a) Linear growth phase
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b) Germination phase
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c) Flowering phase
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d) None of the above
Explanation
Seed germination is considered to be the initiation of the first developmental phase in the lifecycle of higher plants. The flowering stage includes the time when the plant begins to produce fruits and vegetables. In plants, the phase from germination to grow till its maturity is known as growth phase. Answer:(a)
Q.14
hich structure is produced by germination of pollen grain ?
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a) Pollen tube
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b) Style
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c) Tube
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d) Vessels
Explanation
The cell of the pollen grain divides into two cells- one of these is smaller in size and called generative cell and bigger one is called tube cell. The intine grows out through the germ pore and form pollen tube. Answer:(a)
Q.15
hich type of vegetative reproduction occurs in Grape and Hibiscus ?
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a) Cutting
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b) Layering
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c) By seed
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d) Grafting
Explanation
Layering: In this method, one of the branches that is intact and is attached to the parent plant is selected. A portion of that branch is bent into the soil and is covered with moist soil. Example of layering are sugarcane, grapes, rose, Hibiscus, Bougainvillae. Answer:(b)
Q.16
n which reproductive system plants, Animals & Fungi are differentiated morphologically, histologically, and physiologically?
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a) Asexual
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b) Sexual
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c) Vegetative
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d) Artificial reproduction
Explanation
Most of the evolved organisms on the planet, like plants and animals and various multicellular organisms, display sexual reproduction. even though plants, animals, and fungi are quite different from each other in aspects such as morphology, physiology, anatomy etc., all these organisms display sexual reproduction. Answer:(b)
Q.17
ssertion: Corm is a condensed rhizome. Reason: Ginger is a rhizome.
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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
Rhizome, also called creeping rootstalk, horizontal underground plant stem capable of producing the shoot and root systems of a new plant. ginger is a rhizome that grows at, or just under, the surface of the soil. A corm, bulbo-tuber, or bulbotuber is a short, vertical, swollen underground plant stem that serves as a storage organ. Corm is condensed rhizome. Both the statement is correct but reason is not explanation of assertion. Answer:(d)
Q.18
he plants which bears only two types of hetero spores during Sporophytic stage is known as.........
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a) Spores
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b) Somatic spores
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c) Homosporous
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d) Heterosporous
Explanation
Heterospory is the production of spores of two different sizes and sexes by the sporophytes of land plants Answer:(d)
Q.19
atch the appropriate pairs.
Column - I
Column - II
(P) Binary fission
(i) Paramoecium
(Q) Multiple fission
(ii) Hydra
(R) Sporulation
(iii) Amoeba
(S) Budding
(iv) Plasmodium
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a) P-iii, Q-i, R-iv ,S-ii
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b) P-i, Q-ii, R-iii, S-iv
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c) P-iv, Q-iii, R-ii, S-i
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d) P-ii, Q-iii, R-iv, S-i
Explanation
Asexual reproduction
Organism
Binary fission
Amoeba
Multiple fission
Paramoecium
Sporulation
Plasmodium
Budding
Hydra
Answer:(a)
Q.20
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
Binary fission is an asexual mode of reproduction in which the bacteria divides into two equal halves. When the binary fission takes place along the longitudinal plane it is known as longitudinal binary fission. This type of binary fission is seen in euglena. Above example is of Euglena. Answer:(d)
Q.21
dentify A, B and C in the following figure.
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a) A-nucleus, B-chloroplast, C-Pyrenoids
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b) A-chloroplast, B-pyrenoid, C- nucleus
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c) A-pyrenoid ,B-nucleus,C-chloroplast
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d) A-chloroplast,B-nucleus,C-mitochondria
Explanation
Answer:(c)
Q.22
hich of the following is a dioecious plant?
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a) Vallisneria
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b) Maize
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c) Castor
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d) Cucumber
Explanation
Vallisneria: Male flowers grow on short stalks, become detached, and float to the surface. It is dioecious, with male and female flowers on separate plants. Answer:(a)
Q.23
evelopment of an embryo before the adult stage is not found in the following group of organisms:
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a) Bryophytes and Pteridophytes
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b) Algae and Fungus
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c) Mammals and Flowering plants
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d) Birds and Reptiles
Explanation
Thallophyta (algae) reproduce sexually when male gametes and female gametes fuse to form zygote. Zygote immediately undergoes meiosis and it gives haploid gametes. Thus, embryo is not formed. There is no embryonic stage for fungi. They reproduce by means of spores. There are sexual and asexual spores. Answer:(b)
Q.24
n plants, the period between birth and reproductive maturity is called:
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a) Life span
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b) Vegetative phase
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c) Reproductive phase
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d) Senescent phase
Explanation
Juvenile phase is pre-reproductive phase in life cycle of an individual. It is the period of growth between the birth of an individual upto reproductive maturity. Juvenile phase is known as vegetative phase in plants. Answer:(b)
Q.25
tudy the following statements and select the correct option: (i) Bamboo species flowers only once in their life time, generally after 50 – 100 years and produce large number of fruits and die. (ii) In animals, juvenile phase is followed by morphological and physiological changes prior to active reproductive behaviour. (iii) The reproductive phase is same duration in all organisms. (iv) Juvenile phase is the period of growth between birth of an individual till it reaches reproductive maturity.
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a) (i) and (ii) are correct while (iii) and (iv) are wrong
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b) (i), (iii) and (iv) are correct while (ii) is wrong
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c) (i), (ii) and (iv) are correct while (iii) is wrong
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d) All are correct
Explanation
bamboo species flower only once in their life time, generally after 50-100 years.(i) is correct. In animals, the juvenile phase is followed by morphological and physiological changes prior to active reproductive behaviour. (ii) is correct. The reproductive phase is also of variable duration in different organism. (iii) is incorrect. Juvenile phase is pre-reproductive phase in life cycle of an individual. It is the period of growth between the birth of an individual upto reproductive maturity. (iv) is correct. Answer:(c)
Q.26
he vital link that ensures continuity of species between organisms of one generation and the next is:
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a) Male gamete
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b) Zygote
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c) Fertilization
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d) All of above
Explanation
Zygote is the vital link that ensures continuity of species between organisms of one generation and the next. Every sexually reproducing organism, including human beings begin life as a single cell–the zygote. Answer:(b)
Q.27
onsider the following statements and chose the correct option. (a) The genetic constitution of a plant is unaffected in vegetative propagation. (b) Rhizome in ginger serves as an organ of vegetative reproduction. (c) totipotency of cells enables us to micropropagate plants.
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a) Statement (b) is alone is true
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b) Statements (a) and (b) are true
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c) Statements (b) and (c) are true
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d) All the statements are true
Explanation
Vegetative propagation is a form of asexual reproduction. They are essentially clones of the parent plant resulting in zero change in the genetic constitution of a new plant. (a) is correct. In ginger, the vegetative propagation occurs through the underground stem called rhizome. (b) is correct. Totipotency is the genetic potential of a plant cell to produce the entire plant. Totipotency heps in micropropagation as it is in-vitro clonal propagation of plants from shoot tips or nodal explant. (c) is correct. Answer:(d)
Q.28
hat is meiocyte?
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a) The cell undergoes meiosis
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b) The cell undergoes mitosis
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c) Both a and b
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d) None of the above
Explanation
A meiocyte is a type of cell that differentiates into a gamete through the process of meiosis. Through meiosis, the diploid meiocyte divides into four genetically different haploid gametes. Answer:(a)
Q.29
ulb acts as a propagule in
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a) Onion
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b) Garlic
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c) Agave
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d) Both and b
Explanation
Vegetative propagules in angiosperms: (a) Eyes of potato; (b) Rhizome of ginger; (c) Bulbil of Agave; (d) Leaf buds of Bryophyllum; (e) Offset of water hyacinth Answer:(c)
Q.30
------is for increase the number of cells.
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a) Cell enlargement
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b) Cell division
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c) Cell differentiation
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d) Zygote
Explanation
Cell divisions increase the number of cells in the developing embryo. Cell differentiation helps groups of cells to undergo certain modifications to form specialised tissues and organs to form an organism. Answer:(b)
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