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10. Tick the correct answer:

(e) Bryophyllum can reproduce by its

(i) stem     (ii) leaves    (iii) roots     (iv) flower

 

(e) Bryophyllum can reproduce by its (ii) leaves.

10. Tick the correct answer:

(d) A spore producing organism is

(i) rose     (ii) bread mould      (iii) potato     (iv) ginger

 

(d) A spore producing organism is (ii) bread mould.

10. Tick the correct answer:

(c) Mature ovary forms the

(i) seed   (ii) stamen    (iii) pistil     (iv) fruit

 

 

(c) Mature ovary forms the (iv) Fruit.

10. Tick the correct answer:

(b) The process of fusion of the male and the female gametes is called

(i) fertilisation   (ii) pollination    (iii) reproduction    (iv) seed formation

 

 

 

(b) The process of fusion of the male and the female gametes is called (i) Fertilization.  

10. Tick the correct answer:

(a) The reproductive part of a plant is the

(i) leaf (ii) stem (iii) root (iv) flower

(a) The reproductive part of a plant is the (iv) Flower.  

9. Match items in Column I with those in Column II:

Column I                                Column II

(a) Bud                                (i) Maple
(b) Eyes                              (ii) Spirogyra
(c) Fragmentation               (iii) Yeast
(d) Wings                            (iv) Bread mould
(e) Spores                           (v) Potato
                                            (vi) Rose

 

The matched columns are shown below:  Column I Column II (a) Bud (iii) Yeast (b) Eyes (v) Potato (c) Fragmentation (ii) Spirogyra (d) Wings (i) Maple (e) Spores (iv) Bread mould  

8. Describe the various ways by which seeds are dispersed.

Seeds and fruits of plants are carried away by the wind, water, and animals. By wind: Winged seeds such as those of drumstick and maple, light seeds of grasses or hairy seeds of aak (Madar) and hairy fruit of the sunflower, get blown off with the wind to far away places. By water: Some seeds are dispersed by water. These fruits or seeds usually develop floating ability in the form of the spongy...

7. How does the process of fertilisation take place in flowers?

Once the pollen grains spread on the stigma, it produces a pollen tube and this process is called the germination of pollen grains. Then the pollen tube penetrates the style and reaches the ovary where the male nucleus is transferred through this pollen tube and finally, the fusion of male and female nuclei takes place inside the ovary. Thus, this step is called fertilization.  

6. Explain the difference between self-pollination and cross-pollination.

The differences between the self-pollination and the cross-pollination are: S.No. Self-pollination Cross-pollination 1. Within the same flower, the pollen grains are transferred to the stigma. The pollen grains are transferred to the stigma of a different flower. 2. Pollinating agents are not required in this type of pollination. Pollinating agents such as the winds, water, insects, etc....

5. Sketch the reproductive parts of a flower.

The sketch of the reproductive parts fo flower is shown below:

3. Explain what you understand by sexual reproduction.

When two parents are involved in reproduction, the method is called sexual reproduction. During fertilization, the male and female gametes fuse to produce a zygote. Then zygote subsequently develops into an embryo which further develops into a new individual.  

2. Describe the different methods of asexual reproduction. Give examples.

Different methods of asexual reproduction are: (i) Fission: is division, the parent cell divides into two or more cells. Fission can be of two types, namely, binary fission and multiple fission. In binary fission, the parent cell divides into two equal halves called daughter cells. During the multiple fission, the organism divides itself into numerous daughter cells. (ii) Fragmentation: The...

1. Fill in the blanks:

(a) Production of new individuals from the vegetative part of parent is called_____________.

(b) A flower may have either male or female reproductive parts. Such a flower is called_____________.

(c) The transfer of pollen grains from the anther to the stigma of the same or of another flower of the same kind is known as _____________.

(d) The fusion of male and female gametes is termed as _____________.

(e) Seed dispersal takes place by means of _____________, _____________ and _____________.

 

(a) Production of new individuals from the vegetative part of parent is called vegetative propagation. (b) A flower may have either male or female reproductive parts. Such a flower is called unisexual flower. (c) The transfer of pollen grains from the anther to the stigma of the same or of another flower of the same kind is known as pollination. (d) The fusion of male and female gametes is...
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