Sunday, 20 October 2013

Ch-11 Question 21 to 40

Science-Chap-12

Chapter-12

Reproduction in Plants

1.What is reproduction?

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

2.How do plants reproduce?

Plants reproduce through seeds or through other parts.

3.There are _______ modes of reproduction in plants.

Different.

4 What are various parts of a plant?

Leaves, Flower, Fruit, Stem, Roots, Seed.

5. Most plants have roots, stems and leaves. These are called the _______of a plant.

Vegetative parts

6. After a certain period of growth, most plants bear______.

Flowers

7. Mang plants are flowering in ______ and riping in _______?

Spring, Summer.

8. Seeds ______ and form new plants.

Germinate.

9. What is the function of flowers in plants?

The flowers perform the function of reproduction in plants. Flowers are the reproductive parts of a plant.

10. Flowers are the _________ of a plant.

Reproductive Parts.

11.Among the following what fact is true with regard to the characteristic of a flower.

  • (a).A flower may have either the male part or the female part .
  • (b). A flower may have both male and female parts.
  • (c). Fact (a) or (b).
  • (d). None of these facts are true.

Option (c) is true.

12.How many types of methods are among plants for producing offspring.

Two types.

13. What are two types of categories in plants prevalent for producing offspring?

Asexual and Sexual reproduction.

14.How plants reproduce asexually?

In asexual reproduction new plants are obtained from seeds.

15. How plants reproduce sexually?

In sexual reproduction plants can give rise to new plants with seeds.

16.In asexual reproduction new plants are obtained without production of seeds or ____.

Spores .

17.Vegetative propagation is a type of ____ reproduction in plants.

Asexual.

18.How plants are reproduced through Vegetative propagation? Why the method is so called?

In Vegetative propagation new plants are produced from roots, stems, leaves and buds. Since reproduction is through the vegetative parts of the plant, it is known as vegetative propagation.

19.How plants like sugarcane, potato, rose e.t.c reproduce?

These plants are reproduced through Vegetative propagation. New sugar cane plants are produced from a mature sugarcane stem, rose from brance and potato from another potato.

20.A _______ is a part of the stem/branch at which a leaf arises.

Node.

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