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Solutions ⇒ Class 7th ⇒ Science ⇒ 12. Reproduction in Plants

Solutions 12. Reproduction in Plants - Additional Questions With Solutions | Class 7 Science - Toppers Study

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12. Reproduction in Plants

| Additional Questions With Solutions |

Solutions 12. Reproduction in Plants - Additional Questions With Solutions | Class 7 Science - Toppers Study


12. Reproduction in Plants


Que: Write the differences between sexual and asexual method of reproduction.

Ans: Differences between sexual and asexual method of reproduction.

Sexual Reproduction : 

1. Male and female gametes participate for reproduction.

2. New plants are given rise by seeds.

3. There are found diversities in baby plants.

Asexual Reproduction : 

1. There participates only single gamete. 

2. There new plants are grown without seeds.

3. There are found less diversities in baby plants.

Que: Explain the differences between self-pollination and cross-pollination. 

Ans: The pollen of a flower lands on the stigma of the same flower it is called self – pollination, when the pollen of a flower lands on the stigma of another flower of the same plant or that of a different plant of the same kind, it is called cross-pollination. 

 

Que: What is pollination? 

Ans:The transfer of pollen from another to the stigma of a flower is called pollination. 

 

Que: What is fertilisation? 

Ans:The process of fusion of male and female gamates is called fertilisation.

Que: Name a plant which reproduces a new plant through its leaves.

Ans:Brayophillum. 

Que: Name a organism which reproduces new one by budding method.

Ans: Yeast.  

 

Que: Write the difference between unisexual flower and bisexual flower. 

Ans:

unisexual flower bisexual flower

1. It contains either only the pistil or only the stamens. 

2. Example – Papaya, and cucumber. 1. It contains both stamens and pistil.

 

2. Example – mustard, rose and petunia etc. 

Que: Name three plants in which reproduction occur by vegetative propagation.

Ans:Potato, Rose and Sugarcane. 

 

Que: What is reproduction? 

Ans:The production of new individuals from their parents is known as reproduction. 

 

Que: How does dispersal of seeds take place?

                            Or

Que: Describe the various ways by which seeds are dispersed. 

Ans: Ans:Dispersal of seeds takes place by following methods.

(i) By the air and water.

(ii) Through Insects and animals or attached to their bodies.

(iii) Bursting with sudden jerks.  

 

Que: Describe the different methods of asexual reproduction. Give examples. 

Ans:There are four different methods of asexual reproduction.

(i) Vegetative propagation: - In this the new plants are grown from vegetative parts of the plants like roots stems and leaves, since it is called Vegetative propagation. Ex: Potato, Sugarcane and rose. 

 

(ii) Budding: - In yeast, there grow small bulb like projections called buds get detached from the parent cell and grow individuals. Ex: Yeast.

 

(iii) Fragmentation – Algae grow and multiply rapidly by fragmentation. An alga breaks up into two or more fragments. Ex; Algae. 

 

(iv) Spore formation – Fungi reproduce by means of spores. A spore germinates and develops into a new individual. Ex; Fungi. 

 

Que: What is the reproductive part of a plant?

Ans:Flower. 

 

Que: What are the vegetative parts of plants?

Ans:Roots, stems and leaves.

 

Que: What are the modes of reproduction?

Ans: (i) Asexual reproduction.     (ii)  Sexual reproduction. 

 

Que: Define asexual reproduction.

Ans: Such a reproduction in which plants can give rise to new plants without seeds. 

 

Que: Define sexual reproduction.

Ans: Such a reproduction in which plants are obtained from seeds.

 

Que: Draw a labeled diagram of self pollination and cross pollination.

Ans: 

How does the process of fertilisation take place in flowers?

Ans: The cell which results after fusion of the gamates is called a zygote. The process of fusion of male and female gametes is called fertilization which takes places in ovary. The Zygote take develops into an embryo later which develops into seeds.                        

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Solutions ⇒ Class 7th ⇒ Science
1. Nutrition in Plants
2. Nutrition in Animals
3. Fibre to Fabric
4. Heat
5. Acids, Bases and Salts
6. Physical and Chemical Changes
7. Weather, Climate and Adaptations of Animals to Climate
8. Winds, Storms and Cyclones
9. Soil
10. Respiration in Organisms
11. Transportation in Animals and Plants
12. Reproduction in Plants
13. Motion and Time
14. Electric Current and its Effects
15. Light
16. Water : A Precious Resource
17. Forests: Our Lifeline
18. Wastewater Story

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