Reproduction in plants Cbse science class 7th chapter 12 very short question

               Reproduction  in plants 

                             chapter 12 

             

  @    very short answer :          
  1. Define reproduction ?
Ans: The production of new individuals from their parents is known as reproduction
  2.write down the  names of vegetative part of a plant  ?
 Ans. roots ,stems  and leaves are the vegetative part of the plant.
3. Name the reproductive parts of the plant?
Ans : flower 
4.Define asexual reproduction in plants ?
Ans:plant can give rise new plant with out use of seed, this type of reproduction is known as asexual reproduction .
5. Define sexual reproduction in plants ?
Ans: new plants obtained from seed , this type of reproduction is known as sexual reproduction.
6.Define vegetative propagation.
Ans: when the reproduction is occurs through the vegetative part like stem ,leaf, root of the plant, it is known asvegetative propagation.
7.What is axil ?
Ans:point of aatachment of the leaf at the nodesis called axil.
 8. Write down the name of plants which are produce from their roots.
Ans: sweet patato and dahalia.
9.Name the plants which can produce when their parts get detached from main plant body.
Ans: cacti
10.Yeast is _________ celled organism.
Ans: single
11. By which process yeast can reproduce  .
Ans: budding
12. Define bud in yeast.
 Ans: The small bub like projection coming out from the yeast cell is known as bud.
13.Define fragmentation.
Ans. The process by which the new individuals are formed from fragment of the parent plant is known as fragmantation.
14.By which process algae can reproduce.
Ans: fragmantation
15.Fern reproduce by which process.
Ans : spore formation
16.Which plants are reproduce by means of spore.
Ans: moss and fern
17._________are the  male reproductive part of plant.
Ans: stamens
18. __________are the female reproductive part of plant.
Ans: pistil
19.Define unisexual flower.
Ans: The flowers which contain either only the pistil or only the stamens are called unisexual flower.
20. write down the example of unisexual flower.
Ans: corn , papaya and cucumber
21 . Define bisexual  flower .
Ans:  The flowers which contains both stamens and pistil are called bisexual flowers.
22. Write down the example of bisexual flower.
Ans: Mustard, rose and petunia
23.who produce male gamets.
Ans: Anther contains pollen grains which produce male gametes.
24. who produce female gamets.
Ans: ovary
25. How a zygote is formed.
Ans: When male gamet and female gamet fuse to form a zygote
26. Define pollination
Ans: The transfer ofpollen from the anther to the stigma of a flower is known as pollination.
27. Define self -pollination.
Ans: If the pollen lands on the stigma  of the same flower ,then it is called as self-pollination.
28.Define cross-pollination.
Ans: when the pollen of  a flower lands on the stigma of another flower of the same plant, or that of different plant  of the same kind ,known as cross pollination.
29.Define fertilisation.
Ans: The process of fusion of male and female  gamets is known as fertilisation.
30. After fertilisation zygote develops  into __________.
Ans: embryo
31.Seeds and fruits of plants are carried away by _____________.
Ans: wind, water and animals
32. Name the  example of winged seed.
Ans: drumstick , maple, light seed of grasses, hair seed of aak and hair fruit of sunflower.  
33.A pistil consists of ___________
Ans: stigma , style and ovary
34. what is the advantages of seed dispersal.
i) prevent overcrowding
ii) avoid competition for sunlight,water andminerals
iii)  invade new habitats.
35.Who helps in pollination of plants.
pollination takes place in plants with thehelp of  wind , water, and insects.
36.fertilised egg are ________
Ans: zygote


   

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