Chapter 2 : Adaptations in Plants : class 4 - Science![Adaptations in Plants : class 4 - Science]()
Fill in the Blanks
Plains have
moderated climate and
adequate rainfall.
There is plenty of rainfall and sunlight in
plains and
hilly areas.
In desert plants, the
leaves are modified into spins.
There are very few tall trees and bushes in
grassland.The leaves of fixed plants have
waxy coating on the surface to protect them from rooting.
Pitcher plants often grow on
nutrient deficient soil.
Wolffia is a
floating plant.
Assam and
Darjeeling are major tea producing places of our country.
True false statements
Mangroves are found in deserts.
[F]The conical shape of Pine leaves allows snow to sleep off the leaves surface easily.
[T]Marshy areas have very dry soil.
[F]The pitcher plant is a green plant.
[T]Lily is an aquatic plant.
[T]Deciduous trees shed their leaves during summer.
[F]Mould is not a plant.
[F]Tape grass is a Terrestrial plant.
[F]Name The Following…
Plant growing in plains.
Mango2Plant growing in desert.
Cactus2Plant growing in hilly region.
Oak3Plant growing in marshy area.
Avicennia5Question and Answers
What do you mean by Terrestrial plants?
Plants that grow on land are called Terrestrial plants or land plants.
Eg. Mango, Peepal, Sal etc.
Why are evergreen plants so called?
Some plants in hilly areas do not shed their leaves throughout the year and remain evergreen. These plants are called evergreen plants.
Eg. Pine, Fir, Cedar etc.
What are breathing roots?
In marshy areas, the roots of some plants grow above the soil to get plenty of air. Such roots are called breathing roots.
How is a floating plant different from a fixed plant?
Floating plants float freely on the surface of water while fixed plants have their roots fixed in the mud of the bottom of the water body.
How do non-green plants obtain their food?
Non green plants like fungi get their food from dead and decaying plant parts. Moulds grow on nutrient reach surfaces like tree trunks and absorb food from the tree.
What do you know about carnivorous plants?
i) Carnivorous plants are photosynthetic plants. They can prepare their own food.
ii) Their leaves are modified to trap insects.
iii) They grow on nutrient deficient soil.
iv) They need to trap insects to fulfill their nutritional requirements.
v) Carnivorous plants are also called insectivorous plants.
Write about the adaptations of xerophyte.
Xerophytes adapted to survive in dry habitats, such as deserts and mountain ranges. Some xerophytes have well-developed roots that grow deep into the ground and reach water sources below the surface. Roots store water in succulent water-storing parenchyma tissues, so these plants can quickly become hydrated when necessary. Xerophytes also have small, waxy leaves that minimize water loss through transpiration. In some xerophytes, leaves are modified into spines that help protect the plant from predators and damage caused by strong winds and sandstorms. Some xerophytes complete their life cycle within a very short period, depending on the moisture availability.
List some uses of plants for humans.
Humans use plants for various purposes as follows…
Plants Provide Oxygen for human beings.
We can use their various parts, foliage, roots, fruits, etc as Food and medicine.
Some medical uses of plants are Tulsi, Neem, Aloe vera etc.
Plants Provide Shelter for Birds and animals.
Plants increase the rainfall in the geographical region.
Woods and bark are used for making furniture, decorative articles etc.
Plants like cotton, jute, etc. help us to make cloths, bags etc.
Differentiate between the followings...Photosynthesis and respiration
Photosynthesis | Respiration |
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The process by which green plants prepare their food with the help of water, carbon- dioxide, chlorophyll and Sunlight. | The process by which an organism takes in oxygen and and releases Carbon dioxide |
Terrestrial plants and aquatic plants
Terrestrial plants | Aquatic plants |
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Plants which grow on land. | Plants which grow in water. |
Examples - Mango, Cactus, Pine. | Examples - Hydrilla, Lotus, Pustia. |
Differentiate between floating plants and fixed plants.
Floating Plants | Fixed Plants |
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i) Floating plants float freely on the surface of water. | i) Fixed plants have their roots fixed in the mud at the bottom of the water body. |
ii) Examples-Duckweed and pistia. | ii) Examples - Lotus and water lily. |