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CBSE Questions for Class 6 Biology Living Organisms Characteristics And Habitats Quiz 1 - MCQExams.com
CBSE
Class 6 Biology
Living Organisms Characteristics And Habitats
Quiz 1
In which of the following plants are the stems covered by a thick waxy layer?
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Oaks
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Casuarina
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Cactus
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Deodars
Explanation
The stems of cacti are covered with a thick waxy layer so as to prevent the loss of water. This is an adaptation to survive desert climate.
Oaks and deodars are seen in mountains while casuarina trees are seen in the coastal regions.
Hence the correct option is C.
Trees in mountains have needle shaped leaves.
Is the above statement true or false?
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True
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False
Explanation
Trees in mountains are cone shaped and have sloping branches and needle shaped leaves. These allow the snow to slide down.
Hence the given statement is true.
Oaks are seen in deserts while cacti are seen in mountains.
Is the above statement true or false?
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True
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False
Explanation
Oaks are trees found in mountains whereas cacti are seen in deserts.
Hence the given statement is false.
Cactus is seen in the mountains.
Is the above statement true or false?
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True
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False
Explanation
Cacti are plants that are specially adapted to survive in the deserts where the water is scarce. They are not found in mountains.
Hence the given statement is false.
The adaptations of desert plants include
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Long roots
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Waxy covering over the stem
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Leaves absent or reduced to spines
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All of the above
Explanation
Desert plants are adapted to survive in conditions where water is scarce. They have long and deep roots. The stem has a waxy covering to prevent water loss. Leaves are often absent or reduced to spines and photosynthesis is usually performed by the stem.
Hence the correct option is D.
Response to stimuli is shown by
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Plants
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Animals
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Non living objects
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Both A and B
Explanation
Stimuli are the sudden changes in the surrounding to which living organisms respond. Both plants and animals can respond to stimuli. However this characteristic is not shown by non living objects.
Hence the correct option is D.
Organisms can breathe through
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Nostrils
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Skin
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Gills
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All of the above
Explanation
The organ of breathing may vary depending on the type of organism. Earthworms can breathe through the skin. Fish respire through gills. Humans have nostrils.
Hence the correct option is D.
Response to stimuli is shown only by animals.
Is the above statement true or false?
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True
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False
Explanation
Plants can also respond to stimuli. For instance, the touch me not plant curls its leaves when they are touched. The flowers of some plants close after sunset.
Hence the given statement is false.
The plants undergo excretion by
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Storing the wastes
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Secretions
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Urine formation
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Both A and B
Explanation
The mechanisms of excretion in plants are a little different. Some plants find it possible to store the waste products within their parts in a way that they do not harm the plant as a whole. Some
plants remove waste products as secretions.
Hence the correct option is D.
Which of the following forms aquatic habitat?
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River
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Lakes
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Ponds
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All of the above
Explanation
The natural home of an organism and its immediate surroundings is called habitat. It is defined as the natural environment of an organism, the type of place in which it is naturally living and growing. Seas, river, lakes and ponds forms aquatic type of habitat.
So, option D is correct.
The hiding of cockroach when light is switched on is an example of
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Adaptation
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Responding to stimuli
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Respiration
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None of these
Explanation
The cockroach goes and hides when light is turned on. This is an example of the animal responding to sudden changes in the environment and these changes are called stimuli.
Hence the correct option is B.
Desert plants lose a lot of water through transpiration.
Is the above statement true or false?
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True
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False
Explanation
Desert plants lose very little water through transpiration so as adapt to the scanty rainfall.
Hence the given statement is false.
The climate found in the desert is
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Hot and airy
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Humid and airy
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Hot and humid
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Hot and dry
Long and deep roots are seen in plants found in
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Water
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Desert
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Mountains
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Grasslands
Explanation
Most desert plants have long roots that go deep into the soil for absorbing whatever little water that is available.
Hence the correct option is B.
The place where organisms live is called __________.
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Population
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Habitat
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Area
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Community
Explanation
Habitat is defined as an ecological area that has a diverse range of flora and fauna as its inhabitants.
It is characterized by specific temperature and pressure.
It provides food, shelter, protection, and mates for reproduction to the inhabitants.
Habitat is made up of biotic and abiotic factors.
The biotic factors include flora and fauna while the physical factors like soil, water, temperature contribute to abiotic factors.
So, the correct answer is option B.
The spiders and other small insects are found in the
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Cupboards
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Drawers
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Cracks of wall
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All of the above
The aquatic animals like the crabs and fishes were found near
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Himalaya
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Puri
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Rishikesh
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Rajasthan
Explanation
$$\textbf{Correct option:(B)}$$
$$\textbf{Solution:}$$
$$\bullet$$ The aquatic animals like the crabs and fishes were found near Puri.
$$\bullet$$ Puri is a coastal city in the state of Odisha in eastern India.
$$\bullet$$ The Chilika lake is the largest wetland along the east coast.
$$\bullet$$ It has an unique characters of marine,
brackish and fresh water ecosystem (estuarine ecosystem).
$$\bullet$$ It has a rich biodiversity.
$$\bullet$$ Microalgae, marine seaweeds, sea grasses, fishes and crabs are widely found in this lake ecosystem.
The cold mountain ranges are the home to
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Camels and yaks
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Yaks and goats
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Bear and camels
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None of the above
The trees found in the cold mountainous regions are
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Oak, Deodar and Eucalyptus
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Pine, Deodar and Babool
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Oak, Pine and Deodar
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All of the above
Explanation
The trees eucalyptus and babool grow in temperate and tropical regions as they are not adapted to grow under cold conditions. While oak, pine and deodar have adaptions to survive in cold mountainous regions.
Thus, the correct option is C.
The change that takes place in the body of the organism when a stimulus is provided is known as:
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Adaptation
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Response
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Growth
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None of the above
Explanation
An adaptation is a feature that helps an organism, such as a plant or animal, survive in its environment.
A response can be defined as any change in the behaviour of a living organism that results when an external or internal stimulus is provided.
Growth is an irreversible, permanent increase in the
size
of an organ or its parts or even of an individual cell.
So, the correct answer is B.
The removal of the wastes from the body is known as
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Excretion
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Digestion
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Extraction
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Ingestion
Explanation
Excretion is process by which nitrogenous waste is thrown out of body. It is done to avoid toxicity in body by the waste, maintain pH and water level. It's done by various organs like kidney in human, nephridia in worms, etc.
So, the correct option is 'Excretion'.
Reproduction is the ability of the living organisms to
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Show response to stimulus
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Adjust to the change in the climate
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Produce similar of its kind
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Show growth and development
Explanation
Reproduction is the process of producing offspring from parents.
It can be sexual, asexual or vegetative.
Only sexual reproduction involves the fusion of gametes. It ensures the continuity of a species by producing its own kind and also a transfer of genes in further generations.
So the correct option is 'Produce similar of its kind'.
The terrestrial organisms are
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Plants and animals that live on land
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Plants that live in moist and watery areas
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Animals that live only in cold regions
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Plants that live only in aquatic environment
Explanation
Organisms (plants and animals) that live predominantly or entirely on land are termed terrestrial organisms. Examples: dog, snake, man, camel, some plants etc.
So, the answer is A.
The process of taking in and giving out of the air is known as:
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Breathing
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Digestion
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Metabolism
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Excretion
Explanation
Breathing is process of taking in and giving out of the air for exchange of gases between the internal of body and the external environment. The taking in of air is called as inhalation and giving out of air is called exhalation. It is an important part of respiration and can be done by various organs like nose, skin, gills.
Hence the correct option is A, i.e., "breathing".
The living and non-living things can be distinguished by
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The living things cannot move
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The living things need food
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The living things cannot perform respiration
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Both B and C
Explanation
The living things require energy for all basic activities like respiration, movement, reproduction. This energy is obtained by break down of food, therefore, living things need food. But non-living things do not require such energy thus they do not need food.
Hence correct option is B "The living things need food".
Abiotic factors are
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Non-living things in the ecosystem
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Living things in the ecosystem
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Both living and non-living things in the ecosystem
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None of the above
Explanation
Abiotic components or abiotic factors are non-living chemical and physical parts of the environment that influence or affect the functioning of the ecosystem and the organisms in it. Abiotic factors include climate, habitat, temperature, wind, rain, pollution, sunlight, etc.
So, the correct option is A.
The examples of the biotic factors are
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Plants, animals and bacteria
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Soil, sunlight and fungi
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Plants, animals and soil
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Animals, sunlight and fish
Grasslands and desert are the examples of
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Aquatic habitats
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Terrestrial habitats
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Coastal habitats
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Mountainous habitats
Explanation
A habitat is an ecological or environmental area inhabited by one or more living species.
Aquatic habitat is a habitat with water
Terrestrial habitats are ones that are found on land.
Coastal habitats are on coasts. Coasts are places where the land meets the sea.
Mountain habitats are on mountains.
Grasslands and deserts are habitats on land.
So, the correct answer is 'Terrestrial habitat'.
A living organism is unexceptionally differentiated from a non-living structure on the basis of
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Reproduction
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Growth and movement
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Interaction with environment
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Responsiveness
Explanation
All organisms, from primitive prokaryotes to most advanced and complex eukaryotes, are able to sense and respond to environmental factors. The stimuli are perceived by sense organs in higher animals through sensory receptors in the eyes, ears, nose etc. Plants do not possess such sense organs. However, they do respond to external factors such as light, water, temperature, pollutants, other organisms, etc. Human beings have an additional facility of self consciousness (awareness of self). Consciousness and response to stimuli are said to be defining properties of living organisms.
So the correct option is D.
Which of the following is a type of habitat?
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Terrestrial
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Aquatic
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Aquarium
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All of these
Explanation
$$\textbf {Correct Option (D):} $$
$$\textbf {Solution:} $$
$$\textbf {Option (A):} $$
$$\bullet$$ Terrestrial habitat is the land habitat that involves grasslands, forests, mountains, plateaus etc. This includes all the terrestrial plants and animals as well.
$$\textbf {Option (B):} $$
$$\bullet$$ Aquatic habitat exists underwater it can be oceans, ponds, lakes, rivers etc. All the aquatic animals such as fishes, corals, molluscs, and aquatic plants are a part of aquatic habitat.
$$\textbf {Option (C):} $$
$$\bullet$$ Aquarium habitat is an enclosed aquatic habitat. It is an artificial habitat formed in a glass enclosure with selected fishes and plants. All parameters can be controlled in this habitat including light, oxygen, and temperature.
$$\textbf {Option (D):} $$
$$\bullet$$ Hence, all these systems are types of habitats.
Hence, the option(D) is the correct answer.
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