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NEET • BIOLOGY • REPRODUCTION IN ORGANISMS
Reproduction in organisms practice · Easy
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1
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Which of these statement(s) is/are correct?
i) Stamens are male reproductive part whereas carpels are female reproductive parts.
ii) In Spirogyra, asexual reproduction takes place by fragmentation.
iii) Vegetative propagation by leaves occurs in sweet potato.
i) Stamens are male reproductive part whereas carpels are female reproductive parts.
ii) In Spirogyra, asexual reproduction takes place by fragmentation.
iii) Vegetative propagation by leaves occurs in sweet potato.
View answer and explanation
Correct option: A
(i) and (ii)
Option A ((i) and (ii)) is correct because stamens are indeed the male reproductive parts, carpels are the female reproductive parts, and Spirogyra reproduces asexually through fragmentation.
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Rice
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Correct option: A
is a monocarpic plant
Option A (is a monocarpic plant) is correct because rice is an annual plant that flowers and produces seeds only once in its lifetime.
3
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Lowest regeneration power is found in
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Correct option: D
Brain cells
Option D is correct because brain cells have the lowest regeneration power compared to the other options.
4
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Which is the most common method of reproduction in majority of fungi and bacteria?
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Correct option: D
Spore formation
Option D (Spore formation) is correct because many fungi and bacteria reproduce asexually through the formation of spores, which are resistant structures that can develop into new organisms.
5
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Gametogenesis is the formation of
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Correct option: C
Both (1) and (2)
Option C (Both (1) and (2)) is correct because gametogenesis is the process of forming both male and female gametes.
6
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Read the following statements
Statement A : Reproduction enables continuity of the species, generation after generation
Statement B : Zygote is the vital link that ensures continuity of species between organisms of one generation and the next.
Choose the correct option.
Statement A : Reproduction enables continuity of the species, generation after generation
Statement B : Zygote is the vital link that ensures continuity of species between organisms of one generation and the next.
Choose the correct option.
View answer and explanation
Correct option: D
Both the statements are correct
Option D (Both the statements are correct) is correct because both statements accurately describe the importance of reproduction and the role of the zygote in ensuring species continuity.
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Find out the mismatch?
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Correct option: D
External fertilization – Mammals, reptiles, birds
Option D (External fertilization – Mammals, reptiles, birds) is correct because mammals, reptiles, and birds all exhibit internal fertilization, not external fertilization.
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A clone is
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Correct option: B
Homozygote obtained asexually
Option B (Homozygote obtained asexually) is correct because asexual reproduction produces genetically identical offspring, and if the parent is homozygous, the offspring will also be homozygous.
9
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Humans reproduces…A... Humans are…B…. . Fertilization is C…. in humans . Male and female gametes are…D.. . Zygote is…E.. . The process of release of ovum from a mature follicle is called…F.. . Ovulation is induced by a hormone called…G… . The fusion of male and female gametes is called…H…. . Zygote divides to form..I.. which is implanted in uterus . The structure which provides vascular connection between foetus and uterus is called…J… Blanks in the statements A to J in the above statement is
View answer and explanation
Correct option: D
A-sexually, B-viviparous, C-internal, D- haploid, E- diploid, F-ovulation, G-LH, H-fertilisation, I-blastocyst, J-placenta
Option D is correct as it accurately fills all the blanks with the correct terms related to human reproduction.
10
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Emasculation is concerned with
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Correct option: A
Hybridization
Option A (Hybridization) is correct because emasculation, the removal of anthers, is a crucial step in artificial hybridization to prevent self-pollination.
11
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Reproduction is
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Correct option: A
Biological process of producing young ones
Option A (Biological process of producing young ones) is correct because reproduction is fundamentally a biological process aimed at producing offspring.
12
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Female gametes are also called
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Correct option: C
Both (a) and (b)
Option C (Both (a) and (b)) is correct because both "egg" and "ovum" are terms used to refer to the female gamete.
13
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Which of the following statement is not true for a clone?
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Correct option: C
Clone is a result of sexual reproduction
Option C (Clone is a result of sexual reproduction) is correct because clones are produced through asexual reproduction, resulting in genetically identical offspring from a single parent.
14
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Asexual reproduction in plants is called
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Correct option: A
Vegetative reproduction
Option A (Vegetative reproduction) is correct because asexual reproduction in plants specifically involves the use of vegetative parts like stems, roots, or leaves to produce new plants.
15
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Pre – fertilization events includes?
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Correct option: C
Both 1 and 2
Option C (Both 1 and 2) is correct because pre-fertilization events include both gametogenesis (formation of gametes) and gamete transfer.
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Parthenogenesis is the process in which new organism is formed
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Correct option: B
Without fertilization
Option B (Without fertilization) is correct because parthenogenesis is a form of asexual reproduction where an egg develops without being fertilized.
17
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In Banana and water hyacinth, vegetative propagation takes place by
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Correct option: D
Rhizome and offset respectively
Option D is correct because banana propagates through rhizomes and water hyacinth propagates through offsets.
18
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In ginger vegetative propagation occurs through:
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Correct option: D
Rhizome
Option D (Rhizome) is correct because ginger is a modified stem that grows horizontally underground and has nodes that can give rise to new plants.
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In flowering plants both male and female gametes are non-motile. The method to bring them together for fertilization is
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Correct option: C
Pollination
Option C (Pollination) is correct because pollination is the mechanism by which pollen grains (carrying male gametes) are transferred to the stigma of the pistil, facilitating fertilization in flowering plants.
20
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Vegetative propagation in mint occurs by?
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Correct option: C
Stolen
Option C is correct because mint plants spread horizontally using stolons, which are above-ground stems that root at nodes.
21
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Which of the following organisms is considered to be immortal?
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Correct option: D
Amoeba
Option D is correct because Amoeba reproduces through binary fission, where the parent cell divides into two identical daughter cells, effectively continuing its lineage indefinitely.
22
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In oviparous individuals the fertilized egg is covered by
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Correct option: D
Hard shell
Option D (Hard shell) is the correct answer because it accurately describes the protective covering of a fertilized egg in oviparous animals.
23
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In which one pair both the plants can be vegetative propagated by leaf pieces?
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Correct option: A
Bryophyllum and Kalanchoe
Option A (Bryophyllum and Kalanchoe) is correct because both these plants have leaves with buds that can develop into new plants.
24
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Stem cutting are commonly used for the propagation of
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Correct option: B
Rose
Option B (Rose) is correct because stem cuttings are a common and effective method for propagating roses.
25
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Vegetatively propagated plants
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Correct option: D
Clone of their parents
Option D is correct because vegetative propagation produces offspring that are genetically identical to the parent plant, hence clones.
26
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Which one of the following are wrongly matched
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Correct option: B
Water hyacinth – runner
Option B (Water hyacinth – runner) is wrongly matched because water hyacinth reproduces through offsets, not runners.
27
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In yeast cell division results in a small cell called
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Correct option: A
Bud
Option A (Bud) is correct because yeast reproduces asexually by budding, where a small outgrowth forms on the parent cell.
28
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Which plant reproduce vegetatively by roots?
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Correct option: D
sweet potato
Option D (sweet potato) is correct because sweet potatoes develop adventitious buds on their roots, which can grow into new plants.
29
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In frog , chromosome number is reduced to half
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Correct option: D
When 1st polar body is separated
Option D (When 1st polar body is separated) is correct because the chromosome number is reduced to half during meiosis I, which results in the formation of the first polar body.
30
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Lifespan of an organism usually includes?
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Correct option: D
All of these
Option D (All of these) is correct because the lifespan of an organism includes the juvenile phase, the reproductive (maturity) phase, and the senescence phase leading to death.
Revision notes and key takeaways
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Key Takeaways
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