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ASSIGNMENT (SUBMISION DATE 30/07/09)
X ICSE (BIOLOGY)
Absorption by Roots
1. Define the following
a. Imbibition
b. Diffusion
c. Osmosis
d. Tonicity
e. Capillary Force
2. Write the difference between the following
a. Osmosis and Diffusion
b. Turgidity and Flaccidity
c. Guttation and Bleeding
d.Transpiration and Transportation
e. Plasmolysis and Deplasmolysis
3. Name the Following
a. Passage of substance by using energy from cell
b. Process by which water enters Rppts
c. A membrane that allows the passage of molecules Selectively
d.Helps in Absorption of Water and Minerals From the Soil
e. Helps in the Synthesis of enzymes with in the cell
4. Give Reasons for the following
a . Root Hairs contain cell sap of Higher concentration than that of surrounding water
b. Raisins left in water for some time certainly swell up
c. Transpiration pull leads to Absorption of Water
d. Root Pressure is Built due to cell to cell osmosis
e. Salting of Meat will kill Germs
f.Grapes left in water for some time loses shape
g. Wilting of leaves when plant is exposed to the Hot afternoon
h. Turgor in Root cells builds up Root Pressure
i. Leaves of Mimosa pudica drooped down when touched
5. Study the diagram given below and answer the question that follow:
Oil
_ -------
Water
a. Explain the physiological process being studied
b. What will be observed in the two test tubes after two to three days
c. Give a reason for your answer in (b) above
d. Why is the surface of water covered with oil?
e. State the purpose of setting up test tube B

ASSIGNMENT
X CBSE
Topics- Human Eye and Our Environment
1. Which type of Lens is there in human eye and write its function
2. Name the two types of fluids used in human eye
3. Name the part of eye where Image is formed?
4. What is the function of?
a. Ciliary Muscles
b. Iris
c. Pupil
d. Rod Cell
e. Cone cell
5. What is Meant of Power of accommodation of the eye?
6. Name the defect, its Symptoms, and correction for it
a. A person is not able to see Distant Objects
b. A person is not able to see Nearer Objects
c. A person is not able to see Nearer Objects (with age)
d. When Lens become Milky
7. Define the following
a. Universe
b. Eco-System
c. Food Chain
d. Food Web
e. Biological Magnification
f. Biodegradable
g. Non- biodegradable
8. Give an example for each
a. Food Chain
b. Food Web
c. Ozone Layer Depletion
d. Biodegradable Waste
e. Non- biodegradable
9. Explain the Flow of energy Between Various Components of the environment
10. How do our activities affect the environment (explain in terms of Ozone Layer)
11. What is the role of Decomposers in the Ecosystem?
12. How can we manage the Garbage we produce?
ASSIGNMENT
IX STATE
Topics- Magnetism and Light
1. Define the following
a. Magnet
b. Lens
c. Electromagnetism
d. Magnetic effect of electric current
e. Optic Centre
f. Focal length
2. State Maxwell Right hand grip rule
3. Name some instruments which make use Magnetic effect of electric current
4. Enlist some properties of
a. Magnet
b. Magnetic Lines of forces
5. Complete the following Diagram
6. Write the difference between
a. Concave and Convex Lens
b. Principal axis and Principal focus
7. Draw the Ray Diagram for the following in case of both Convex and Concave lens
a. When the object is between F and 2F
b. When the object is between O and F
c. When the object is At 2F
d. When the object is at F
e. When the object is beyond 2F
8. What conclusion you will draw after making Ray Diagram
ASSIGNMENT
IX ICSE
Topics-Nutrition and Digestive System
1. Define the following
a. Peristalsis
b. Nutrition
c. Symbionts
d. Digestion
e .Biocatalyst
f. Basal metabolic Rate
g. Defecation
2. Write the difference between the following
a. Predator and Parasite
b. Omnivore and Scavenger
c. Kwashiorkar and Marasmus
3. Name the following
a. Hardest substance in the body
b. Part of tooth which has Lymph Vessels
c. Salivary Gland which is located below the tongue
d. Bone like structure fixing the root in position
e. Part of Alimentary canal which is nearly empty after death
f. vestigial organ(in terms of Alimentary canal)
g. Two water soluble Vitamins
h. Opening between Stomach and Intestine 4. Write the Deficiency Diseases for the following
a. Cobalt
b. Magnesium
c. Molybdenum
d. Niacin
e. Phylloquinone
f. Calciferol
g. Retinol
h. Ascorbic acid
5. Draw a neat labeled diagram of Digestive System
6. Write the Dental formula and give atleast one function for ea 7. Write the enzymes present in the following and write its function
a. Stomach
b. Pancreatic juice
c. Bile
d. Ileum
8. Explain emulsification of fats and name the enzymes which help in it