describe the str of mature anatropous ovule
Answers
This ovule is found in 80 percent families of Angiosperms but not in Capsella.The chalaza and micropyle lie in a straight line. In this ovule micropyle is facing downward condition. This is the most common type of ovule of angiosperms it is considered as a "typical ovule" of Angiosperms. It is also known as resupinate ovule.
Answer:
(1) The OVule which nas a bent axis and downwardly directed micropyle is called anatropous ovule.It is the most common type of ovule in anglosperms.
(2) The matured anatropous ovule consists of two parts, viz., the stalk and the body. The stalk of the ovule is called the funicle or funiculus. The funicle attaches the Ovule with the placenta.
(3) The point at which the funicle is attached to the body of the ovule is called hilum.
(4) Nucellus : It is made up of diploid parenchymatous cells. The basal part of the nucelhus is called chalaza. The protective coverings of the ucellus are called integuments.
(5) Micropyle: The integumenis do not completely cover the nucellus. They leave a small opening called micropyle at the ip.
(6) Embryo sac: n a mature ovule, the nucellus shows an oval-shaped structure towards its micropylar end called embryo sac or female gametophyte.