Morphology of Flowering plants

1. Name  the structure which protects the root tip.
2. Name the root system that develops from any part of the plant body other than the radicle.
3. Name the part of the plant which develops from the radicle in dicots.
4. Name 2 aquatic plants with photosynthetic roots.
5. Name two plant with fleshy adventitious roots.
6. The 4 o'clock plant and sweet potato (Ipomoea batatas) are similar in one aspect and dissimilar in another aspect with reference to the nature and modification of roots. Write their difference.
7. Name the roots which have indefinite shape.
8. What is the name given to the modified stem of Opuntia?
9. Name the phyllode with one internode.
10. What is the main function of tendrils?
11. Give an example of cladode.
12. Thorn of Bougainvillea and the tendril of Cucurbita are homologous organs. How?
13. Which plant parts has transformed into (a) tendril of pumpkin and (b) thorn of citrus?
14. What takes over the function of photosynthesis in Opuntia?
15. What kinds of stems are found in banana and Amorphophallus?

Answers:

1. Root cap
2. Adventitious root system
3. Tap or primary root system
4. Trapa and Tinospora
5. Dahilia and sweet potato
6. Both the plants have the tuberous roots but the roots in 4 O'clock plant are lobed and modified tap root while the roots of the sweet potato are modified adventitious roots and arise singly.
7. Tuberous roots
8. Phylloclade
9. Cladode
10. Tendrils help in climbing
11. Asparagus
12. Both develop from the axil of the leaf but perform different functions. The former gives protection while the latter helps in climbing.
13. Both are modifications of stem
14. The stem is modified into a thick, flattened leafy structure to carry out photosynthesis in Opuntia.
15. Banana stem is a rhizome and Amorphophallus stem is a corm.