| Coleoptile | Coleorhiza |
| A foliar structure called the coleoptile surrounds the epicotyl and a leaf primordium |
Roots and their caps are enclosed in a sheath called a coleorhiza. |
| It protects the plumule during emergence from soil. |
For the first leaf to appear, there is an opening at the end of the coleoptile. The colorhizae are solid structures. |
| Plumules are protected from soil when they emerge from soil. |
Radicles are not protected when they pass through the soil. |
| It grows much beyond the grain | After emergence from grain it stops growing |
| Coleoptile after emergence from soil |
Coleorhiza does not come out of soil. |
| Germination occurs when the seed becomes green and begins to photosynthesise. |
It remains nongreen |
What is apomixis and what is its importance?
Explain the role of tapetum in the formation of pollen-grain walls.
If one can induce parthenocarpy through the application of growth substances, which fruits would you select to induce parthenocarpy and why?
What is meant by emasculation? When and why does a plant breeder employ this technique?
Why is an apple called a false fruit? Which part(s) of the flower forms the fruit?