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CBSE Questions for Class 6 Biology Living Organisms Characteristics And Habitats Quiz 3 - MCQExams.com
CBSE
Class 6 Biology
Living Organisms Characteristics And Habitats
Quiz 3
Brown skin is a characteristic of animals seen in ________.
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Mountains
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Water
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Deserts
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Grasslands
Explanation
Animals living in dry grasslands such as lions have brown skin. This helps them to hide and capture the prey.
Hence, the correct option is C.
Animals in mountains have
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Thick fur
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Long hair
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Strong hooves
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All of these
Explanation
Thick fur and long hair helps in protecting the animals from the cold. Strong hooves help the animals walk through the sloping terrain.
Hence the correct option is D.
Adaptations are changes occurring over short periods.
Is the above statement true or false?
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True
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False
Explanation
There are some changes that can happen in an organism over a short period to help them adjust to some changes in its surroundings.
Such small changes that take place in the body of a single organism over short periods, to overcome small problems due to changes in the surroundings, are called acclimatization.
These changes are different from the adaptations that can take place over hundreds of years.
Hence, the given statement is false.
Camels have long legs.
Is the above statement true or false?
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True
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False
Explanation
Camels have long legs that helps them to stay away from the heat of the ground.
Hence the given statement is true.
Long ears, eyes on the side of the head and high speed are characteristic features of
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Deer
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Lion
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Camel
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None of these
Explanation
These are characteristic features of deer and they help them to become quickly aware of the presence of predators and quickly flee.
Hence the correct option is A.
Cold and windy habitat is characteristic of
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Deserts
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Mountains
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Grasslands
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None of these
Explanation
Mountains have cold and windy habitats with snowfall in winter. Animals and plants living here have special adaptations for surviving in these conditions.
Hence the correct option is B.
Animals living in desert possess which of the following characteristics?
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Light brown colour
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Thick fur
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Long hair
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Stay in burrows during the day
Explanation
Animals like rats and snake stay in burrows during the day and come out only at night so as to protect themselves from the heat.
Thick fur and long hair are seen in animals in mountains.
Brown colour is seen in animals in grasslands.
Hence the correct option is
Lion is a ________ and deer is a __________.
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prey , predator
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prey, prey
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predator, prey
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predator, predator
Explanation
Lions are predators that hunt and kill deer which are their prey.
Hence the correct option is C.
Why do plants in mountains have sloping branches and needle shaped leaves?
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To absorb more water
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To prevent the loss of water
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To allow rainwater and snow to slide off
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All of these
Explanation
The trees in mountains have an overall conical shape. They have sloping branches and needle shaped leaves that allows the snow and rainwater to slide off easily.
Hence the correct option is C.
Reduced role of roots is seen in plants living in
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Mountains
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Deserts
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Water
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Grasslands
Explanation
In terrestrial plants, roots normally play a very important role in the absorption of nutrients and water from the soil. However, in aquatic plants, roots are much reduced in size and their main function is to hold the plant in place.
Hence the correct option is C.
Leaves reduced to spines and thick stems are characteristics of plants seen in
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Deserts
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Mountains
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Grasslands
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Water
Explanation
Desert plants lose very little water through transpiration.
The leaves in desert plants are either absent, very small, or they are in the form of spines.
This helps in reducing the loss of water from the leaves through transpiration.
The leaf-like structure you see in a cactus is, in fact, its stem.
Photosynthesis in these plants is usually carried out by the stems.
Hence the correct option is A.
The leaves of all aquatic plants float on the surface of water.
Is the above statement true or false?
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True
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False
Explanation
Some aquatic plants are submerged in water. All parts of such plants are under water. Some of these plants have narrow and thin ribbon-like leaves. These can bend in the flowing water. In
some submerged plants, leaves are often highly divided, through which the water can easily flow without damaging them.
Hence the statement is false.
Which of the following have long, hollow and light stems?
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Desert plants
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Aquatic plants
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Mountain plants
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None of the above
Explanation
The stems of some aquatic plants are long, hollow and light. The stems grow up to the surface of water while the leaves and flowers, float on the surface of water.
Thus, the correct answer is option B.
Aquatic plants are always completely submerged in water.
Is the above statement true or false?
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True
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False
Explanation
Not all aquatic plants are completely submerged in water. Some aquatic plants have long and slender stems with the leaves and flowers floating on the surface of water.
Hence the statement is false.
Leaves of aquatic plants
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Float on the surface of water
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Are submerged in water
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Both A and B
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None of the above
Explanation
The leaves of some aquatic plants float on the surface of water. However some aquatic plants are completely submerged and all parts are beneath the surface of water.
Hence the correct option is C.
Aquatic plants have long and prominent roots.
Is the above statement true or false?
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True
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False
Explanation
The roots of most aquatic plants are reduced in size and their only function is to hold the plant in place.
Hence the given statement is false.
Which of these is a characteristic of aquatic plants?
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Small sized roots and long slender stems
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Reduced transpiration
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Long and deep roots
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Needle shaped leaves
Explanation
Aquatic plants often have small roots and long slender stems with leaves floating on the surface of the water. However, some aquatic plants are completely submerged.
Hydrophytes have small roots because minerals and gases which are needed for respiration and photosynthesis are dissolved in the surrounding water and thin, flexible stems make floating and moving in the water easy.
Reduced transpiration and long deep roots are characteristics of desert plants.
Needle shaped leaves are seen in plants found in mountains.
Hence, the correct option is A.
A teacher tells her students that the roots of a particular plant are short and do not have much significance. The plant she is talking about is likely to be found in
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Desert
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Mountains
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Water
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Grasslands
Explanation
In terrestrial plants, roots normally play a very important role in the absorption of nutrients and water from the soil. However, in aquatic plants, roots are much reduced in size and their main
function is to hold the plant in place.
Hence the correct option is C
Aquatic plants have
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Roots of reduced size
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Needle shaped leaves
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Waxy covering over stem
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All of these
Explanation
The roots of aquatic plants are small sized and help only in holding the plant in place.
Needle shaped leaves are seen in mountain plants.
Waxy covering over stem is seen in plants living in the desert.
Hence the correct option is A.
Thin ribbon like leaves are characteristic of plants seen in
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Deserts
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Mountains
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Grasslands
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Water
Explanation
Some aquatic plants are submerged in water. All parts of such plants are under water. Some of these plants have narrow and thin ribbon-like leaves. These can bend in the flowing water. In some submerged plants, leaves are often highly divided, through which the water can easily flow without damaging them.
Hence the correct option is D.
Which of the following is not a non- living object?
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Chair
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Stone
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Bus
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Mushroom
Explanation
Mushroom is a fungi and is a living saprophytic organism. Chair, bus and stones are non living objects.
Hence the correct option is D.
Which is of the following is not exclusive only to living organisms?
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Growth in size
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Respiration
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Reproduction
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Excretion
Explanation
Respiration, reproduction, and excretion are processes that are seen only in living organisms. However, growth in size is observed in certain non-living things as well such as clouds.
Hence, the correct option is A.
Aquatic plants have thick stems.
State whether the given statement is true or false.
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True
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False
Explanation
The stems of aquatic plants are generally long, hollow and slender. Thick stems that perform photosynthesis are found in desert plants.
Hence the given statement is false.
Aquatic plants have sloping branches and needle shaped leaves.
Is the above statement true or false?
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True
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False
Explanation
Sloping branches and needle shaped leaves are characteristics of plants found in mountains. Aquatic plants usually have long and slender stems with leaves either floating on water or submerged and ribbon like.
Hence the statement is false.
All objects that exhibit growth can be considered living organisms?
Is the above statement true or false?
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True
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False
Explanation
The given statement is false. There are certain objects such as clouds which are non living but can grow in size.
Which is of the following is not a characteristic feature of aquatic plants?
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Short roots
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Long slender stems
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Ribbon shaped leaves
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Long deep roots
Explanation
Long and deep roots are characteristic features of desert plants.
Aquatic plants generally have short roots and slender stems. Leaves may be floating on the surface of water or may be submerged and ribbon like.
Hence the correct option is D.
How does an organism obtain energy?
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Food
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Respiration
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Both A and B
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Excretion
Explanation
The body obtains energy first by consumption of food and then by breaking them down through the process of respiration.
Hence the correct option is C.
The roots of terrestrial and aquatic plants are very similar.
Is the above statement true or false?
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True
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False
Explanation
In terrestrial plants, roots normally play a very important role in the absorption of nutrients and water from the soil. However, in aquatic plants, roots are much reduced in size and their main function is to hold the plant in place.
Hence the given statement is false.
If an object can move, it is considered as a living organism. Is the statement true or false?
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True
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False
Explanation
The given statement is not true as there are certain non-living substances such as cars and buses that can move but are not living.
So, the correct answer is option B.
The changes in the surrounding to which our body responds are called
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Respiration
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Habitat
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Adaptation
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Stimuli
Explanation
Stimuli are the changes in the surrounding to which our body responds. Respiration is the utilization of food to obtain energy. Habitats are the places where an organism lives. Adaptations are the changes an organism makes to survive.
Hence the correct option is D.
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