DAV Class 6 Science Solution Chapter 7 The World of Living
DAV School Books Class 6 Science Solution Chapter 7 The World of Living all Question Answer. DAV Class 6 7th Chapter The World of Living full Chapter explanation by expert teacher.
DAV School Books Class 6 Science Solution Chapter 7 The World of Living:
A.) Fill in the blanks.
Answer: (1) living things.
Answer: (2) unicellular.
Answer: (3) photosynthesis.
Answer: (4) stimuli.
Answer: (5) Herbs.
B.) Write True or False for the following statements.
Answer: (1) False.
Answer: (2) True.
Answer: (3) True.
Answer: (4) True.
Answer: (5) True.
Answer: (6) True.
C.) Tick (✓) the correct option.
1.) Which of these statements is true for plants?
Answer: (b) green plants are autotrophic.
2.) Which of the following plants belongs to the category of shrubs?
Answer: (b) Rose.
3.) Which one among these is not a flowering plant?
Answer: (b) Algae.
4.) Biennial plants are those plants which live for _______.
Answer: (c) Two years.
5.) All living organisms have _________.
Answer: (c) Cells.
6.) Which of these is an invertebrate?
Answer: (a) Snail.
(D) Answer the following questions in brief.
(1) Name any three important characteristics of living beings.
Answer:-
(1) Living things made up of cells.
(2) living things need food to grow
(3) Living things respire.
(2) State the difference between autotrophs and heterotrophs.
Answer:-
Autotrophs – The organisms which produce their food on their own are called autotrophs. Example – plants.
Heterotrophs – the organisms which are dependent on other organisms for their food called heterotrophs.
Example – human being
(3) Give two examples each of annual, biennial and perennial plants.
Answer:-
Annual plants – corn, pea Biennial plants – carrot and onion
Perennial plants – Asparagus, ginger.
(4) Give two examples each of animals which reproduce (i) by laying eggs (ii) by giving birth to young ones.
Answer:-
Animals reproduce by laying eggs – fish, crocodile Give birth to young ones – human beings, goat
(5) Give two examples each of vertebrates and invertebrates.
Answer:-
Vertebrate – mammals and birds Invertebrates – jellyfish, earthworm.
(6) Write the names of any four useful products obtained from plants.
Answer:-
Products obtained from plants – food, rubber, colours, oil.
(E) Answer the following questions.
(1) All living things respond to external stimuli. Justify this statement with examples.
Answer:-
(1) The top of the shoot always moves towards light
(2) Earthworms move away from light.
(3) Dropping a leaf of touch me not plant is a response to touch.
(2) A cloud is considered as non-living even though it can move and can grow bigger. Explain why?
Answer:- Do clouds can move and grow but they are not showing all the characters of living things like –
They can’t reproduce, they can’t breathe, they can’t excrete like organisms, they are not made up of cells and they are not responding to the stimuli. That’s why the clouds are not considered as living organisms.
(3) Write two points of differences between
(i) herbs and shrubs and
(ii) shrubs and trees.
Answer:-
Difference between herbs and shrubs –
Herbs –
(1) Herbs have soft stem
(2) Herbs are generally small in size Example – ginger and coriander
Shrubs –
(1) shrubs are quite bigger in size as compared to herbs.
(2) Steps have a body stem. Example – rose, Tulsi
Difference between shrubs and tree –
Shrubs –
(1) Shrubs are medium-sized plants.
(2) They have a bushy appearance. Example – rose.
Rat rani.
Tree –
(1) Trees are large and tall plants. Trees have strong and woody stem Example – mango, neem.
(4) State the differences between biennial and perennial plants.
Answer:- Biennial plants – Biennial plants live for two seasons.
In the first season they have full vegetative growth and in the second season they show fruits and flowers.
Example – carrot and reddish
Perennial plants –
(1) This plants life for many years
(2) They show fruits and flowers many times in their life span. Example – guava and custard apple
(5) Name two types of terrestrial plants. How do they differ on the basis of their habitat and water requirements?
Answer:-
Terrestrial plants –
(1) Mesophytes grow on land.
(2) Mesophytes require abundant water for survival.
(3) They have medium-sized roots.
(4) Example – Apple tree and mango tree.
Xerophytes –
(1) Xerophytes grow in the desert.
(2) They need very little water for survival.
(3) Their roots are deep underground.
(4) Example – cactus,babool.
(6) How are vertebrates different from invertebrates?
Answer:-
Vertebrates –
Vertebrates have a backbone which. Vertebrates are well developed
Example – human beings, frogs, birds, lizards
Invertebrates –
Invertebrates are without backbone. Their bodies are soft.
Example – jellyfish, earthworm octopus
(7) Write any four uses of animals in our daily life.
Answer:-
Four uses of animals
(1) We get wool and leather from animals.
(2) We get meat and eggs from animals.
(3) We get milk from animals
(4) Animals are used for transportation.
Value based questions:
Q.) Sanchi noticed a collection of leaves, grass and some tiny twigs in one corner of her school building. She was about to remove them when her teacher, who was passing nearby, stopped her from doing so. The teacher told her that it was a nest being made by a bird, to lay its eggs. She advised Sanchi to be kind and considerate towards all living beings.
(1) List the values displayed by Sanchi’s teacher.
Answer: Sanchi is kind and considerate.
(2) Give one example each of (i) a vertebrate (ii) an invertebrate animal that ‘reproduces through eggs’.
Answer:-
(i) reptiles, mammals, birds, and amphibians.
(ii) insects, arachnids, worms, mollusks, crustaceans, and jellyfish.
3.) State the reason that might have made Sanchi think of removing the collection of leaves, twigs etc., from the corner of the school building.
Answer:- She might be thinking of removing them because it is making the school dirty.
Something To Do:
1.) Write the uses of plants.
Answer:-
1.) Provide us food, like fruits, vegetables, etc.
2.) Provide us medicines.
3.) Provide shade during hot, sunny days.
4.) Prevent air pollution.
5.) Help to reduce soil erosion.
6.) Provide paper.
7.) Plants are a good source of wood and timber.
8.) Plants also provide oil, spices, perfumes, etc.
9.) Plants give oxygen during the day time.
10.) Plants provide fibres like cotton, jute, etc.
3.) Who am I?
(a) I am a mesophyte. My fruit is liked by you all. It is often known as the king of fruits. Who am I?
Answer: Mango.
(b) We have a strong bony skeleton and well-developed bodies. Who are we
Answer: We are humans who have a well developed body.
(c) I am the structural and functional unit of life. All animals and plants have as their basic unit. Who am I?
Answer: Cell.
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