Biology
Given alongside is a figure of the vertical section of a typical bisexual flower. Study the same and answer the following questions :
- Label the guidelines 1 to 9.
- Which of the above labelled parts constitute the pistil? Write the numbers and names of those parts.
- Name the part which produces pollen grains.
- Is it a complete/incomplete flower ? Give reason in support of your answer.
- Write one important role of the part labelled as 6.
Answer
The parts 1 to 9 given in the diagram are:
1 → Thalamus
2 → Sepal
3 → Filament
4 → Anther
5 → Petal
6 → Stigma
7 → Anther
8 → Style
9 → OvuleThe parts in the given figure that constitute the pistil are:
6 → Stigma,
8 → Style, and
9 → Ovules.The anther contains pollen sacs which produce a yellow, powdery material consisting of pollen grains.
The given figure shows a complete flower. This is because all four whorls viz. calyx, corolla, androecium and gynoecium are present in the same flower.
One important role of Stigma is that it receives the pollen grains during pollination.
Related Questions
Give the difference in function between Filament and Style.
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 :
- Name the structure which divides the embryonic and endospermic region of the grain.
- Among the parts labelled by you above, which one of them is protienaceous in nature ?
- Name the food component which is stored in the endosperm.
- Mention the part of the seed which develops into the root.
- Why do we call it as a 'grain' and not as a seed or fruit ?
The figure given alongside represents the vertical section of a fruit. Study the same and answer the following questions :
- Identify the fruit and mention whether it is a true fruit or a false fruit.
- Label the guidelines 1, 2, 3 and 4.
- Write the collective name for the parts shown as 1, 2 and 3.
- Name the part of the flower which matures into part 4.
- Which of the above labelled parts of the fruit is fleshy and edible ?