Class 7 Science - Chapter Reproduction in Plants NCERT Solutions | Fill in the blanks: (a) Production of
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) Vegetative propagation
Vegetative propagation is an asexual method of reproduction in plants in which lower plants reproduce vegetatively through various methods like budding, fission, fragmentation, spores, buds etc. With the flowering parts roots, stems, leaves and buds helps in the vegetative propagation. For example: tuberous roots of modified plants can be vegetatively propagated when planted in soil.
(b) Unisexual
A flower may have either male or female reproductive parts. Such a flower is called unisexual flower whereas bisexual flower possess both stamen (male reproductive organ) and pistil.
(c) Pollination
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. This is of two types: self- pollination (it involves the transfer of pollen grains from the anther to the stigma of the same flower) and cross- pollination (it involves the transfer of pollen grains from the plant of one flower to the stigma of another plant).
(d) Fertilization
The process in which the male gamete fuses with the female gamete that is present in ovule to form a new cell called diploid zygote is called fertilization that occurs within the embryo sac or female gametophyte.
(e) Air, water and insects
Seed dispersal takes place by various agent that is responsible for cross pollination. Anemophily (wind pollination) is the mode of transfer of pollen grains from anther to stigma through the agency of wind. Hydrophily is the water pollination in which the transfer of pollen grains from anther to stigma occurs through the agency of water. Wind and water pollination both are the abiotic factors of the pollination. Entomophily is the animal pollinator or biotic category in which the transfer of pollen grains from anther to stigma occurs through the agency of insects like moths, flies etc.
More Questions From Class 7 Science - Chapter Reproduction in Plants
- Q:-
Sketch the reproductive parts of a flower.
- Q:-
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 - Q:-
Describe the various ways by which seeds are dispersed.
- Q:-
Describe the different methods of asexual reproduction. Give examples.
- Q:-
How does the process of fertilisation take place in flowers?
- Q:-
Explain the difference between self-pollination and cross-pollination.
- Q:-
State the main difference between asexual and sexual reproduction.
- Q:-
Explain what you understand by sexual reproduction.
- Q:-
Tick the correct answer:
(a) The reproductive part of a plant is the
(i) leaf (ii) stem (iii) root (iv) flower(b) The process of fusion of the male and the female gametes is called
(i) fertilisation (ii) pollination
(iii) reproduction (iv) seed formation(c) Mature ovary forms the
(i) seed (ii) stamen
(iii) pistil (iv) fruit(d) A spore producing plant is
(i) rose (ii) bread mould
(iii) potato (iv) ginger(e) Bryophyllum can reproduce by its
(i) stem (ii) leaves
(iii) roots (iv) flower
Popular Questions of Class 7 Science
- Q:-
State similarities and differences between the laboratory thermometer and the clinical thermometer.
- Q:-
State differences between acids and bases.
- Q:-
Classify the changes involved in the following processes as physical or chemical changes:
(a) Photosynthesis
(b) Dissolving sugar in water
(c) Burning of coal
(d) Melting of wax
(e) Beating aluminium to make aluminium foil
(f ) Digestion of food - Q:-
Name the elements that determine the weather of a place.
- Q:-
Fill the missing word in the blank spaces in the following statements:
(a) Wind is——————air.
(b) Winds are generated due to —————— heating on the earth.
(c) Near the earth’s surface __________air rises up whereas ___________ air comes down.
(d) Air moves from a region of ——— pressure to a region of ———. - Q:-
In addition to the rock particles, the soil contains
(i) air and water
(ii) water and plants
(iii) minerals, organic matter, air and water
(iv) water, air and plants - Q:-
Why does an athlete breathe faster and deeper than usual after finishing the race?
- Q:-
Match structures given in Column I with functions given in Column II.
Column I Column II
(i) Stomata (a) Absorption of water
(ii) Xylem (b) Transpiration
(iii) Root hairs (c) Transport of food
(iv) Phloem (d) Transport of water
(e) Synthesis of carbohydrates - Q:-
Classify the following as motion along a straight line, circular or oscillatory motion:
(i) Motion of your hands while running.
(ii) Motion of a horse pulling a cart on a straight road.
(iii) Motion of a child in a merry-go-round.
(iv) Motion of a child on a see-saw.
(v) Motion of the hammer of an electric bell.
(vi) Motion of a train on a straight bridge. - Q:-
Why do organisms need to take food?
Recently Viewed Questions of Class 7 Science
- Q:-
Explain how forests prevent floods.
- Q:-
Distinguish between a parasite and a saprotroph.
- Q:-
Mark ‘T’ if the statement is true and ‘F’ if it is false:
(i) Nitric acid turn red litmus blue. (T/F)
(ii) Sodium hydroxide turns blue litmus red. (T/F)
(iii) Sodium hydroxide and hydrochloric acid neutralise each other and form salt and water. (T/F)
(iv) Indicator is a substance which shows different colours in acidic and basic solutions. (T/F)
(v) Tooth decay is caused by the presence of a base. (T/F) - Q:-
Why should we worry about the conditions and issues related to forests far from us?
- Q:-
Match the words of Column I with those given in Column II:
Column I Column II
1. Scouring (a) Yields silk fibres
2. Mulberry leaves (b) Wool yielding animal
3. Yak (c) Food of silk worm
4. Cocoon (d) Reeling
(e) Cleaning sheared skin - Q:-
Fill in the blanks:
(i) The average weather taken over a long time is called ___________. (ii) A place receives very little rainfall and the temperature is high throughout the year, the climate of that place will be ___________ and ___________ .
(iii) The two regions of the earth with extreme climatic conditions are ___________ and __________. - Q:-
Explain the role of forest in maintaining the balance between oxygen and carbon dioxide in the atmosphere.
- Q:-
Why do we get instant energy from glucose?
- Q:-
Zubeda made an electric circuit using a cell holder shown in Fig. 14.4, a switch and a bulb. When she put the switch in the ‘ON’ position, the bulb did not glow. Help Zubeda in identifying the possible defects in the circuit.
- Q:-
Tick (✓) mark the correct answer in each of the following:
(a) Fat is completely digested in the
(i) stomach (ii) mouth (iii) small intestine (iv) large intestine(b) Water from the undigested food is absorbed mainly in the
(i) stomach (ii) foodpipe (iii) small intestine (iv) large intestine
- All Chapters Of Class 7 Science
- All Subjects Of Class 7