Adaptations in Plants Class 4 - Science - Questions and Answers

Chapter 2 : 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. Mango2
Plant growing in desert. Cactus2
Plant growing in hilly region. Oak3
Plant growing in marshy area. Avicennia5

Question 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
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
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
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.