Class 7 Science Chapter 12 Reproduction in Plants

  Class 7 Science Chapter 12 Reproduction in Plants

Class 7 Science Chapter 12 Reproduction in Plants Question & Answers [ncert solutions for class 7 science chapter 12 question answer]

Q1 : Fill in the blanks:

  1. Production of new individuals from the vegetative part of parent is called ________.
  2. A flower may have either male or female reproductive parts. Such a flower is called _________.
  3. 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 _________.
  4. The fusion of male and female gametes is termed as __________.
  5. Seed dispersal takes place by means of _________, _________ and _________.

Answers-

  1. vegetative propagation
  2. unisexual
  3. pollination
  4. fertilisation
  5. wind,water,animals

 

Q2 : Describe the different methods of asexual reproduction. Give examples.

Plants reproduce asexually in the following ways:

A plant can reproduce new plants from its roots, stems, leaves, and buds. Vegetative propagation is divided into two types.

Vegetative propagation occurs naturally and involves simple vegetative parts. Potato plant sprouting from a potato eye is an example.

Budding The small bulb-like projection coming out from the yeast cell is called a bud. The bud gradually grows and gets detached from the parent cell and forms a new yeast cell.it is observed in yeast.

Fragmentation  is a form of asexual reproduction where a new organism is formed from fragments of the parent organism. Spirogyra reproduces only asexually.

Spore formation Many non-flowering plants reproduce by spores. Spores are small cells covered in a thick wall. Fungi such as bread moulds reproduce asexually using this method.

 

Q3 :Explain what you understand by sexual reproduction.

Seeds are produced during sexual reproduction. It Needs two parents. Flowers help plants reproduce sexually. A flower’s most significant function is reproduction, so that it can produce seeds that can grow new plants.

 

Q4 : State the main difference between asexual and sexual reproduction.

Differences between sexual and asexual reproduction:

Asexual reproduction occurs when only one parent can create offspring without the formation of gametes. They are truly the same as their parents. There is no special need for reproductive organs.

Two parents are involved in sexual reproduction, both male and female. In this type of reproduction, the gametes are needed to produce the new generation. Characteristics of both their parents can be passed on to the next generation.

 

Q5 :Explain the difference between self-pollination and cross-pollination.

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