Question Pool Reproduction in Organisms

Reproduction in Organisms - SAMAGRA Question Pool & Answers | Class 12

Kerala Syllabus SAMAGRA SCERT SAMAGRA Question Pool for Class 12 Biology Reproduction in Organisms

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Qn 1.

Fertilization  occurs inside or out side the body of an organism. Name the types of fertilization. Which one is more advantageous  ?

 


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Qn 2.

Water hyacinth is also known as scourge of water bodies or 'terror of Bengal”.Justify.



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Qn 3.

Choose the correct answer .

The most common asexual microscopic motile structures seen in algae

 a) Conidia   b) Gemmule     c) Zoospores    d)Buds



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Qn 4.
Amoeba asexually multiplies by binary fission where as sponges  by ……………….


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Qn 5.

Observe the figures given below,identify and name the organisms and their asexual reproductive structures

 

                        (a)

                             (b)



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Qn 6.

The size of the crows and parrots are not very different  but their life span show a wide difference. Justify your answer 



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Qn 7.

Match the following organisms to their life spans

        A                                                        B

i. Butterfly                                          140- years

ii. Crow                                               100-150 yers

iii. Parrot                                             1-2 weeks

iv. Tortoise                                           15 years



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Qn 8.

Observe the relationship of the first pair and fill the blank

Chara  :  Monoecious plant      :::   Marchantia.::............................................



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Qn 9.

Choose hermaphrodites from the list given below:

Sponges,Cockroach,Leech,Lizard, Earthworm.

Define hermaphrodites.



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Qn 10.

a) Define reproduction? Mention its significance.



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Qn 11.

Name the reproductive structure of the following organisms.

a) Penicillium b) Sponge c) Hydra d) Algae



 



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Qn 12.

Name two organisims exhibiting external fertilisation.

Write the disadvantage of external fertilization ?



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Qn 13.

The chances of survival of young one is greater in viviparous organism. Why?



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Qn 14.

Compare juvenile phase and vegetative phase in organisms.



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Qn 15.

Name the common motile asexual reproductive structure seen in Chlamydomonas.

 



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Qn 16.

Penicillium  reproduce asexually by conidia whereas sponges by ...............................



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Qn 17.

Fill in the blanks

Water hyacinth vegetatively propagates by Offset ,but Agave vegetatively propagates by ......................................................



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Qn 18.

Name the most common asexual microscopic motile structures seen in algae.



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Qn 19.

S       Select the correct answer.

The most common asexual microscopic motile structures seen in algae.

a) Conidia b) Gemmule c) Zoospores d) Buds



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Qn 20.

Define menstrual cycle. What is the term given to this kind of changes that takes place in non-primates?



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Qn 21.

List out any four changes that occur in a flower after fertilization.



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Qn 22.

Observe the diagrams given below and identify the types of gametes.

 



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Qn 23.

Water hyacinth vegetatively multiplies by offset ,while Agave multiplies by ………



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Qn 24.

What  are hermaphrodites?  Give two examples.



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Qn 25.

In Apple tree the chromosome number of meiocyte is 34 .Give the number of chromosome in the following cells of apple tree .

  a) Male gamete   b) Female gamete   c) Zygote d)Embryo cells    



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Qn 26.

Offsprings of oviparous animals  are at a greater risk as compared to offsprings of viviparous animals. Substantiate your answer.



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Qn 27.

Observe the diagram .

a) Identify the type of asexual reproduction shown in this diagram.

b) Name two organisms whiich reproduce by this method.

 



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Qn 28.
The thick wall of fruit which is protective in function  is called …………………….

 



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Qn 29.

Asexual and sexual reproduction  are two types of reproduction in organisms.

Which one is more better? Why?



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Qn 30.

In some organisms the female gamete develops to form new organisms without fertilization.

a)Name this phenomenon.

b) Give two examples.



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Qn 31.

Match the following items A with B

    A                                                         B

1.Rhizome                                      a.Agave

2.Bulbils                                          b.Water hyacinth

3.Leaf bud                                       c.Ginger

4.Offset                                            d.Bryophyllum



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