Name the organelle which is known as suicidal bags of the cell
8.Who discovered nucleus
9.Name the thick waxy coating of epidermis in desert plants
10. Name the tissue which is responsible for the flexibility in plants.
11. Name the principle on which the rocket works
12. Name a lustrous non metal
13. The allotropic form of non metal is a good conductor of electricity. name the allotrope.
14. Answer the questions below the passage on the basis of your understanding of the
paragraph and the related studied concepts.
An experimental setup was prepared which consisted of two beakers .one beaker had water to
which peeled pieces of carrot have been added. In the second beaker saturated sugar solution
was put in which peeled pieces of carrot have been added. The setup was kept overnight .
i)what will be the difference in the physical state of carrots as observed in the two beakers
ii)Name the type of solution in each beaker with respect to the carrot pieces
iii) which property of the cell membrane has resulted in the observation?
iv) what is isotonic solution?
# The following question consists of two statements Assertion(A) and reason(R) answer these
questions selecting the appropriate option given below.
( a ) Both A and R are true and R is the correct explanation of A
( b ) Both A and R are true but R is not the correct explanation of A
( c ) A is true but R is false
( d) A is false but R is true .
15. Assertion : the cell membrane is a Dead part of the cell.
Reason; it regulates the movement of materials between the interior of the cell and the outer
environment.
16. Assertion: plant cells have a single large vacuole .
Reason :vacuole is responsible for the ingestion of food substance .
Answers
Science/Chemistry
Name the organelle which is known as suicidal bags of the cell: lysosomes
Who discovered nucleus: Ernest Rutherford
Name the thick waxy coating of epidermis in desert plants: cutin
Name the tissue which is responsible for the flexibility in plants: collenchyma
Name the principle on which the rocket works: conservation of momentum
Name a lustrous non metal: Graphite, Iodine, Diamond (choose one)
The allotropic form of non metal is a good conductor of electricity. name the allotrope.: graphite
i) Because of osmosis it can be endosmosis or exosmosis we can observe the difference in physical state of the carrot
ii) Hypotonic and hypertonic respectively
iii) (I am not really sure but here is my guess) pH partition
iv) Isotonic solution is a solution that has the same salt concentration as cells and blood.
Both A and R and true and R is the correct explanation of A
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