Science and Technology 2 Balbharati Model Question Paper Set 3 2018-2019 SSC (English Medium) 10th Standard Board Exam Question Paper Solution

Answer the following question.
Wisdom teeth : Vestigial organs :: Lungfish : ....................

Select the two options in the 'B' group related to 'A' group.

State whether true or false. If false, rewrite with the correct sentence.
"The disease related with the synthesis of insulin is heart disease."

True

false

Answer in one sentence.
"The forest conserved in the name of god and considered to be sacred."

Write the type of asexual reproduction shown in the figure.

Re-write the statement by selecting the appropriate option.
Due to which similar characteristic honey bee and cockroach are included in the same phylum?

wings

three pairs of legs

jointed appendages

antenna

Transfer of information from molecules of DNA to mRNA is called as ______ process.

Gene

Mutation

Translocation

Transcription

Gradual development

Appendix

Re-write the statement by selecting the appropriate option.
Citric acid used in production of beverages, toffees, chocolates is obtained by fermentation of ..................... by aspergillus niger.

grapes

sugar molasses

apple

coffee nuts

Re-write the statement by selecting the appropriate option.
What will you do, if the domestic gas cylinder bursts?

Sprinkle water

Throw soil or sand

Cover the cylinder with wet bed sheet

Run away

Re-write the statement by selecting the appropriate option.
The solar lamp uses the ................... energy.

Heat

Wind

Light

Sound

Answer the questions by observing the following figure.
A) Write the name of the device shown in the accompanying diagram.
B) Write briefly the work of this device.

Write the factors affecting the environment.

Write two uses of biotechnology related to human health.

Identify the class of the animal shown in the figure and write any two characteristics.

Write what the sign indicate.

Write what the sign indicate.

Name the following method of solid waste management.

Distinguish between

Mitosis and meiosis.

a) Explain in brief - Lamarck’s principle of ‘use or disuse of organs’.
b) Give two examples.
c) What are ‘acquired characters’?

Answer the following questions.

a) Why some living organisms have to perform anaerobic respiration?
b) Give examples of such living organisms.
c) What are the two steps of anaerobic respiration?

If frog population in paddy fields declines all of a sudden,
a) What will be the effect on paddy crop?
b) Number of which consumers will decline and which will increase?
c) Name the Indian states where paddy is cultivated on a large scale.

a) What is clean technology ?
b) Why is it essential to ban plastic bags?

Observe the figure and answer the questions given below.
a) Name the reaction.
b) Where is this reaction used?
c) Which element is used in it?

Observe the figure and answer the questions given below.
a) To which phylum these organisms belong?
b) Name the substance with which their body is covered.
c) Name their organs of locomotion.

Explain in brief - D.N.A. Fingerprinting. Give two examples where this technique is used.

Observe the figure and answer the questions given below.

a) What does the above figure indicate?
b) Which human organs are involved in this process?
c) Name the hormones responsible for this process.
d) After how many days these repetitive changes take place?
e) ‚A woman should stay away from others, as her body is impure during this process.‛ What is your opinion about this statement? Elaborate it.

Observe the figure and answer the questions given below.

a) What do these figures indicate?
b) Which gadgets can be misused for these?
c) Give two examples of such events.
d) Name the act amended by Government of Maharashtra to control such events.
e) What care should be taken by a person to avoid such events?