(i) What is the purpose of seed dispersal in plants?
(a) To attract pollinators
(b) To spread seeds away from the mother plant
(c) To protect seeds from animals
(d) To prevent germination
Ans: (b)
Seed dispersal ensures that seeds are spread to new locations for optimal growth conditions.
(ii) Which part of a seed is responsible for storing food?
(a) Shoot
(b) Cotyledon
(c) Seed coat
(d) Embryo
Ans: (b)
Cotyledons contain stored food in a seed.
(iii) What is the primary factor required for seed germination?
(a) Sunlight
(b) Air
(c) Water
(d) Fertilizer
Ans: (c)
Water is essential for seeds to absorb and germinate.
(iv) Which of the following is an example of a monocot plant?
(a) Bean
(b) Wheat
(c) Mustard
(d) Mango
Ans: (b)
Wheat is an example of a monocot plant.
(v) How are seeds of grasses primarily dispersed?
(a) By animals
(b) By explosion
(c) By water
(d) By wind
Ans: (d)
Grass seeds are light and are carried away by the wind.
(i) ______ are tiny structures produced by ferns on the lower surface of their leaves for reproduction.
Ans: Spores
Ferns reproduce through spores produced on their leaves.
(ii) In agriculture, Dr. MS Swaminathan is known as the 'Father of ______ Revolution in India.
Ans: Green
Dr. MS Swaminathan is recognized for his contributions to the Green Revolution.
(iii) Rabi crops are grown in the ______ season.
Ans: Winter
Rabi crops are cultivated during the winter season.
(iv) Seeds disperse by ______ when dried fruits explode, spreading the seeds away from the mother plant.
Ans: Explosion
Some plants disperse seeds by exploding dried fruits.
(v) _________ are chemicals used to kill insects and fungi that damage plants.
Ans: Pesticides
Pesticides are used by farmers to protect crops from pests.
Match the plant with its method of reproduction:
Ans:
(i) All seeds germinate.
Ans: False
Not all seeds germinate; various factors can prevent germination.
(ii) Coconut is a fruit that can drift in the sea before germinating.
Ans: True
Coconuts can float on water and drift in the sea before germinating.
(iii) Weeds are plants that farmers intentionally cultivate.
Ans: False
Weeds are wild, unwanted plants that grow in fields.
(iv) Seeds of grasses are primarily dispersed by animals.
Ans: False
Seeds of grasses are primarily dispersed by the wind.
(v) The shoot is the first part to emerge when a seed germinates.
Ans: False
The root is the first part to emerge during seed germination.
1. What are the different methods of plant reproduction? |
2. How do plants reproduce without seeds? |
3. What is the importance of pollination in plant reproduction? |
4. How are seeds dispersed in plants? |
5. What is the role of flowers in plant reproduction? |
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