Select the-correct sequence from the following:

(1) Gametogenesis → Syngamy → Zygote → Embryogenesis

(2) Gametogenesis → Syngamy → Embryogenesis → Zygote

(3) Zygote → Embryogenesis → Gametogenesis

(4) Syngamy → Gametogenesis → Zygote → Embryogenesis

Concept Questions :-

Introduction & Types of Reproduction
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Select the correct sequence from the following:

I. Juvenile phase → Senescent phase → Reproductive phase

II. Juvenile phase → Reproductive phase → Senescent phase

III. Reproductive phase → Juvenile phase → Senescent phase

IV. Vegetative phase → Reproductive phase → Senescent phase

(1) I and II

(2) I and IV

(3) III and IV

(4) II and IV

Concept Questions :-

Introduction & Types of Reproduction
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I. Bamboo species flower only once in their life time, generally after 50 -100 years, produce large number of fruits and die

II. In animals the juvenile phase is followed by physiological changes prior to active reproductive behaviour.

III. The reproductive phase is of same duration in all organisms.

IV. Juvenile phase is the period of growth between the birth of an individual till it reaches reproductive maturity.

V. In plants juvenile phase is also called vegetative phase.

Which of the following statements is false?

(1) I

(2) II

(3) III

(4) V

Concept Questions :-

Introduction & Types of Reproduction
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Many mammals, especially in natural, wild conditions are:

(1) Continuous breeders

(2) Seasonal breeders

(3) Both continuous and seasonal breeders

(4) Very much disease sensitive

Concept Questions :-

Introduction & Types of Reproduction
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Which of the following regulates the reproductive processes and the associated behavioural expressions of organisms?

(1) Hormones

(2) Environmental factors

(3) Abiotic components

(4) Interaction between hormones and environmental factors

Concept Questions :-

Introduction & Types of Reproduction
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A

B

C

Identify gametes (A, B and C) respectively:

(1) Heterogametes, isogametes, Homogametes

(2) Isogametes, homogametes, heterogametes

(3) Homogametes, isogametes, heterogametes

(4) Homo / Isogametes, heterogametes, heterogametes

Concept Questions :-

Pre Fertilization Events
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Meiosis:

(1) Does not take place in organisms showing asexual reproduction only

(2) Takes place in some sexually reproducing haploid organism

(3) Takes place in sexually reproducing diploid organism

(4) All of the above are correct

Concept Questions :-

Pre Fertilization Events
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Reptiles and birds are:

(1) Oviparous

(2) Viviparous

(3) Ovoviviparous

(4) Viviparous and oviparous respectively

Concept Questions :-

Fertilisation Events
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Find out the incorrect statement(s):

(1) The chances of survival of young ones are greater in viviparous animals than in oviparous animals

(2) In Datura, tomato, etc. sepals remain attached even after fertilization

(3) Asexual reproduction is better than sexual reproduction

(4) All of these

Concept Questions :-

Introduction & Types of Reproduction
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Ploidy of ovary, anther, egg, pollen, male gamete and zygote are respectively:

(1) 2n, 2n, n, 2n, n, 2n

(2) 2n, 2n, n, n, n, 2n

(3) 2n, n, n, n, n, n

(4) 2n, 2n, n, 2n, 2n, 2n

Concept Questions :-

Pre Fertilization Events
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