Question
Question: Monocot seeds have A.Embryo with a single cotyledon. B.Plumule also called shoot tip is present ...
Monocot seeds have
A.Embryo with a single cotyledon.
B.Plumule also called shoot tip is present on the upper side and is protected by leaf-like covering called coleoptile.
C.Radicle is found on the lower side of the embryo.
D.All of the above.
Solution
Monocot plants also called monocotyledons are grass or grass like plants. It includes Corn, wheat and rice, ginger, banana, sorghum, onion, coconut and garlic.
Complete answer:
The monocot seed is made up of following parts:
1.Seed coat: It is the outermost layer of the seed which is usually brownish in colour
2.Endosperm: The major part of the seed is the endosperm which helps in storage of food.
3.Embryo
Let us analyze the options to find out the correct option.
Option A, B & C: The embryo of the monocot seed contains a single lateral cotyledon which is called scutellum.The scutellum is generally shield-shaped and is located laterally towards a side of the embryo axis. At its two ends the embryo axis with plumule and radicle are present. The plumule is protected by coleoptile which is a protective sheath while the radicle is surrounded by coleorhiza. Root cap protects the tip of the radicle
Option D: Since all of the above options are correct.
Hence, the correct answer is option (D)
Note: When the seeds germinate on the cotyledon become the first leaves of the seedling that is why monocots have only one cotyledon.Coleorhiza and coleoptile are absent in dicot seeds.