Question

CLASS IX
BIOLOGY
CH. 5. THE FUNDAMENTAL UNIT OF LIFE.
TOPIC: PROCESSES INVOLVED IN TRANSPORT
1.
Name the processes involved in passing of fluids across the plasma membrane.
2.
Diffusion takes place according to concentration gradient. Is it possible for materials to to move
against concentration gradient? If yes, mention why this is required.
3.
When an animal cell is placed in Isotonic solution, in which direction will water flow? Explain.
When RBCs are placed in hypotonic solution, they swell. Name this process. When they are
placed in Hypertonic solution, they shrink. What is the term given for this process?
5.
Define the following terms:
(a) Osmosis (b) Diffusion (c) Plasmolysis (d) Deplsmolysis
6.
If an organism living in marine water is taken into fresh water, will it survive? In the same way, if
a fresh water unicellular organism is placed in marine water, will it survive? Give scientific
explanation for your answer.
7.
Give two examples each for the situations in which diffusion and osmosis takes place in plants.
8.
To study the nuclear content, why is hypotonic treatment given to animal cells?
9.
While performing an experiment in the Biology lab in the school, Udit placed some onion cells in
hypotonic solution. After 10 minutes, he recorded his observations. Will there be any increase in
the cell size? Give the scientific reason behind his observation.
10. How do you think the guard cells become flaccid and turgid during the closing and opening of
stomata?​

Answer 1

Answer:

1.The process involved in passing of fluid across plasma membrane is

cytoplasm

Answer 2

Answer: number 1

Explanation:

because it shows how many and it def makes more sense then the other ones