Give the difference in function between pollen grain and ovule.

Draw a neat diagram of the 'longitudinal section of a maize grain' and label its seven important parts. Answer the following questions :

1. Name the structure which divides the embryonic and endospermic region of the grain.
2. Among the parts labelled by you above, which one of them is protienaceous in nature ?
3. Name the food component which is stored in the endosperm.
4. Mention the part of the seed which develops into the root.
5. Why do we call it as a 'grain' and not as a seed or fruit ?

Given alongside is a figure of the vertical section of a typical bisexual flower. Study the same and answer the following questions :

1. Label the guidelines 1 to 9.
2. Which of the above labelled parts constitute the pistil? Write the numbers and names of those parts.
3. Name the part which produces pollen grains.
4. Is it a complete/incomplete flower ? Give reason in support of your answer.
5. Write one important role of the part labelled as 6.

The figure given alongside represents the vertical section of a fruit. Study the same and answer the following questions :

1. Identify the fruit and mention whether it is a true fruit or a false fruit.
2. Label the guidelines 1, 2, 3 and 4.
3. Write the collective name for the parts shown as 1, 2 and 3.
4. Name the part of the flower which matures into part 4.
5. Which of the above labelled parts of the fruit is fleshy and edible ?