Q. What is soil formation called?

Q. Amylase enzymes act on

1. Protein
2. Fat
3. Sugar
4. Starch

Q. The excretory of earthworm is

1. Green glands
2. Malpighian tubule
3. Setae
4. Nephridia

Q. ........... plant hormone is used for ripening of the fruits.

Q. Emergency hormone is

1. Thyroxine
2. Insulim
3. Adrenaline
4. Aldosterone

Q. Match the pairs :

Q. Write the name of any rootless free floating aquatic plant.

Q. By which insect lac is obtained?

Q. Rafflesia is a ........... parasite plant.

Q. Write the name of movement found in 'Touch me not' plant.

Q. Explain reflex-action in short.

Q. Blood bank in human body is

1. Spleen
2. Liver
3. Lungs
4. Heart

Q. Write two functions of cerebrospinal fluid.

Q. Doors of house swell up in the rainy season due to what reasons?

Q. Write two functions of HCl.

Q. Explain in brief transport of CO${}_2$ in respiration.

Q. Draw the well labelled diagram of longitudinal section of ovule.

Q. Write two adaptions of aquatic plants.

Q. Ball and socket joint is present in

1. Wrist
2. Neck
3. Shoulder
4. Fingers

Q. Write two significance of double fertilization.

Q. When is world environment day celebrated?

Q. Draw the well labelled diagram of human nephron and define haemodialysis.

Q. Write two advantages of cross-pollination.

Q. The main constituent element of chlorophyll is

Q. Write two harmful effects of green house effects.

Q. Draw only ray-diagram of spermatogenesis.

Q. Define joints and explain ball and socket joint with diagram.

Q. Define vernalization and write its two advantages.

Q. Write two functions of Gibberellin hormone.

Q. Rate of transpiration is measured by which instrument?