Reproduction in Organisms - NEET 2020 2021Contact Number: 8527521718Reproduction in Organisms - NEET 2020 2021Contact Number: 8527521718Which of the following statement is not true for period between birth to the natural death?
(a) It is known as life – span
(b) It is highly variable
(c) Not necessarily correlated with size of organism
(d) Two organism with same size will have same life – span
Following are statements related to Reproduction how many of them are correct?
(I) It is a biological process.
(II) Similar offsprings are produced.
(III) Offsprings after maturity produces new offspring.
(IV) It enables continuity of species generation after generation.
Options :
(a) All are correct
(b) Only (III) is incorrect
(c) (I), (II) and (IV) is correct
(d) (II) and (IV) is correct
In biological world each organism has evolved its own mechanism of reproduction, which depends upon?
(a) Habitat (b) Internal physiology
(c) Size of organism (d) Both (a) and (b)
Following are four statements how many of them are related to asexual reproduction?
(I) There is participation of one organism.
(II) It is with or without the formation of gametes.
(III) Results in production of clones.
(IV) Only occurs in unicellular organism.
Options :
(a) 4 (b) 3
(c) 2 (d) 1
Find incorrect statement about asexual reproduction.
(a) It is common among single-celled organisms.
(b) It occurs in plants and animals with relatively simple organizations.
(c) It results in production of clones.
(d) It involves fusion of gametes.
Which of the following is matched incorrectly?
|
|
Organism |
|
Mode of asexual Reproduction |
|
(a) |
Zoospore |
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Chlamydomonas |
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(b) |
Conidia |
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Penicillium |
|
(c) |
Bulbil |
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Agave |
|
(d) |
Stem buds |
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Bryophyllum |
How many of the following statement is true for most invasive weed of standing water?
(I) It drains oxygen from the water.
(II) It is introduced in India for its beautiful flower and shape of leaves.
(III) It multiply vary fast by offset.
(IV) It is also known as ‘terror of bengal’
Options :
(a) 1 (b) 4
(c) 3 (d) 2
In Plants such as potato, sugarcane, banana, Ginger, Dahlia, the site of origin of new plantlets is?
(a) Nodes (b) Internodes
(c) Root (d) More than one option is correct
Statement – 1 : Asexual reproduction is common mode of reproduction in organisms that have a relatively simple organization.
Statement – 2 : In organism with simple organization, sexual reproduction takes place during adverse conditions.
Options :
(a) Both 1 and 2 is correct (b) 1 is correct but 2 is false
(c) 1 is false but 2 is correct (d) Neither 1 nor 2 is correct
How many of the following statement differentiate sexual reproduction from asexual reproduction?
(I) There is formation of gamete. (II) Fusion of gamete takes place.
(III) It is an elaborate, complex and slow process.
(IV) Offsprings are not identical to parents.
Options :
(a) 4 (b) 3
(c) 2 (d) 1
Which of the following is true for morphologically and genetically similar individuals?
(a) They are known as clone.
(b) They are produced as a result of asexual reproduction.
(c) Both (a) and (b) is correct.
(d) Two individuals are involved.
In Bryophyllum vegetative reproduction takes place with the help of leaf due to the presence of?
(a) Axillary bud (b) Adventitious bud
(c) Apical bud (d) Both (a) and (b)
“All organisms have to reach a certain stage of maturity and growth, before they can reproduce sexually”. How many of the following is true for above statement?
(I) It is known as juvenile phase.
(II) It is known as vegetative phase in plants.
(III) It is of different duration in different organisms.
(IV) It is of same duration in different organisms.
Options :
(a) 4 (b) 3
(c) 2 (d) 1
In which type of plants it is very difficult to clearly define vegetative, reproductive and senescent phase?
(a) Annual (b) Biennial
(c) Perennial (d) Seasonal
What is the similarly between Bamboo and Strobilanthus kunthiana?
(a) Bamboo sp. flowers in 50 – 100 yrs and strobianthus in 12 years.
(b) Both show unusual flowering phenomenon.
(c) Both flowers only once in life-time.
(d) Both (b) and (c)
Which of the following statement is not correct for sexual reproduction?
(a) It takes place only when organism attains maturity
(b) Events and process associated with sexually reproducing organism shows fundamental similarly.
(c) Structures associated with sexual reproduction in different organism shows similarity.
(d) All the events during sexual reproduction takes place in regular sequence.
Which of the following statement is true?
(a) In majority of sexually reproducing organisms gametes are homogametes.
(b) Gametogenesis is the only pre-fertilisation event.
(c) In majority of sexually reproducing organisms gametes are heterogametes.
(d) More than one option is correct
Find odd one out with respect to sexuality in plants :
(a) Papaya and Date palm
(b) Date palm and Morus
(c) Morus and Papaya
(d) Cucurbits and Coconuts
Match the following :
(I) | Heterogamets | (A) |  |
(II) | Monoecious plant | (B) |  |
(III) | Dioecious plant | (C) |  |
(IV) | Bisexual flower | (D) |  |
Options :
I II III IV
(a) A B C D
(b) A C B D
(c) D A B C
(d) D A C B
In diploid organism gamete formation takes place by process of meiosis. This meiosis takes place in specialized cells known as :
(a) Sporocytes (b) Meiocytes
(c) Mitocytes (d) Gonocytes
How many of the following statement is true for gamete transfer?
(I) In majority of cases it is male gamete which is transferred, and female gamete is stationary.
(II) In few fungi and algae both male and female gametes are motile.
(III) A medium is required for the transfer of gamete.
(IV) Large number of male gametes fails to reach female gamete thus number of male gamete produced is several thousand, times the number of female gamete.
Options :
(a) 1 (b) 2 (c) 3 (d) 4
Which of the following is most vital event during sexual reproduction?
(a) Formation of gamete (b) Transfer of gamete
(c) Fusion of gamete (d) Movement of gamete
Which of the following is not correct for external fertilization?
(a) It is common for aquatic organisms such as majority of algae, fishes as well as amphibians.
(b) It shows great synchrony between the sexes.
(c) During this large number of gametes are produced to enhance chances of syngamy.
(d) Survival rate of offsprings in external fertilization is very high.
How many of the following statement is related to internal fertilization?
(I) It is common in terrestrial organisms and in majority of plants.
(II) Male gamete is generally mobile and has to reach the egg.
(III) There is reduction in number of egg produced.
(IV) In seed plants, non-motile male gametes are present.
Option :
(a) 1 (b) 3 (c) 4 (d) 2
Which of the following is universal for all sexually reproducing organisms?
(a) Formation of zygote
(b) Formation of gamete by two parents
(c) External fertilization
(d) Internal fertilization
Further development of zygote depends upon?
(a) Type of life cycle followed by organism.
(b) Environment in which that zygote develops.
(c) Behaviour of that organism.
(d) Both (a) and (b)
Which of the following structure is considered as vital line that is responsible for continuity of species between organisms of one generation and the next?
(a) Gamete (b) Zygote
(c) Embryo (d) Seed
During embryogenesis zygote undergoes all except?
(a) Mitosis (b) Differentiation
(c) Modification (d) Meiosis
Find out the correct statement :
(a) Life spans of organisms are necessarily correlated with their sizes.
(b) The sizes of crows and parrots are not very different, so their life spans are almost similar.
(c) A peepal tree has much shorter life span as compared to a mango tree.
(d) Reproduction is essential for continuity of species on the earth.