Biology : PU-CET (U.G) 2016 Panjab University Entrance Exam With Answers

Practice Mode:
44.

Development Of Embryo Sac From Any Cell Of Nucellus Is Called :

A: Apogamy
B: Apospory
C: Parthenogenesis
D: Sporogenesis

The answer is: B

Explanation

The correct answer is B: Apospory.

Apospory is a type of apomixis, which is a form of asexual reproduction in plants. In apospory, the embryo sac, which is the female gametophyte, develops directly from a somatic cell of the nucellus, bypassing the normal sexual process of meiosis and fertilization. This results in the formation of a new plant that is genetically identical to the parent plant. Apospory is a relatively rare phenomenon, occurring in only a few plant species.

Apogamy is also a type of apomixis, in which the embryo develops from a cell of the sporophyte, without undergoing the process of meiosis and fertilization. Parthenogenesis is a form of reproduction in which the offspring develops from an unfertilized egg, while sporogenesis is the process of formation of spores in plants or fungi.