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Which of the following protozoan shows hologamy?

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Important Questions on Reproduction in Organisms

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Which one of the following generates new genetic combinations leading to variation?
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Which of the following plants is monoecious?
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Choose the correct statements from the following:
A) Meiosis has to occur if a diploid body has to produce gametes
B) In Cladophora it is not possible to categorise the male and female gametes
C) Organisms exhibiting external fertilization show greater synchrony between sexes
D) In Wolffia isogametes can be seen
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Which of the following animal is not viviparous?
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In some plants, the female gamete develops into embryo without fertilization. This phenomenon is known as
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Chose the incorrect statement of gamete transfer.
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Assertion (A): Zygote is the link between two generations
Reason (R): Zygote is the product of two gametes and producer of next generation
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Match the items given in Column I with those in Column II and select the correct option given below:
 
  Column – I   Column – II
a. Proliferative Phase i. Breakdown of an endometrial lining.
b. Secretory Phase ii. Follicular Phase
c. Menstruation iii. Luteal Phase
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Match the following:

  List - I   List - II
A) Isogamy I) Vorticella
B) Anisogamy II) Plasmodium
C) Hologamy III) Monocystis
D) Conjugation IV) Amoeba
    V) Trichonympha

The correct match is

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Which one of the following does NOT represent asexual reproduction?
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Strobilanthus kunthiana flowers once in _______
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The fish which keeps the fertilised eggs guarded in the mouth and exhibits buccal incubation is
HARD
Which of the following flowers only once in its life-time?
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Which is the most common mechanism of genetic variation in the population of sexually-reproducing organism?
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Morphologically and Physiologically similar and usually motile and flagellated gametes are known as_____and its correct example is _____.
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Choose the correct statements related to binary fission of Paramecium?
(i) During favourable conditions Paramecium stops feeding after attaining its maximum growth.
(ii) At first the micronucleus divides by amitosis and the macronucleus divides into two daughter nuclei by mitosis.
(iii) The proter receives the anterior contractile vacuole, cytopharynx and cytostome from its parent individuals.
(iv) Before karyokinesis a transverse constriction appears in the middle of the body.
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Which one of the following shows isogamy with non-flagellated gametes?
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Offspring formed due to sexual reproduction have better chances of survival. Why? Is this statement always true?
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Consider the following (a to f)

a. All annuals

b. Few biennials

c. All biennials

d. Few perennials

e. Perennials mostly

f. Monocarpic plants

Find correct option w.r.t. plants showing clear-cut vegetative, reproductive and senescent phases.
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Higher organisms have resorted to sexual reproduction in spite of its complexity. Why?