Question

Megasporangium is equivalent to
A.Embryo
B.Nucellus
C.Ovule
D.Fruit

Answer 1

Hint: The megasporangium in flowering plants is made up of nucellus, integuments, and funiculus through which it adheres and attaches to the placenta. When fertilization is completed, that is fusion of male and female it develops into a seed.

Complete answer:
In biology, megasporangium is a name that is given to an ovule that is made up of a nucleus, integuments, and funiculus. The funiculus is defined as a short stalk-like structure and it helps in attachment with the placenta. The integuments serve as an cover an opening which is known as micropyle and it serves as the site for the entry of pollen tubes during the fertilization in the flowering plants. There is one more structure called hilum and it attaches the main body of ovule or megasporangium to the funiculus.

Now let us find answer from given options:
A.Embryo: it is also called as future generation and it is the result of fertilization. This ensures the continuity of generation and survival advantage.
B.Nucellus: It is the central part of the ovule. This part consists of an embryo sac within it. It helps to provide nourishment to the developing embryo.
C.Ovule: It is also called as megasporangium. This structure is a precursor and evolution sign of the seed habit. The formation of ovules was first seen in pteridophytes.
D.Fruit: it is the result of fertilization. It is an edible part of the plant. It acts as equivalent to reproductive result. But it is not equivalent to megasporangium.

Hence, the correct answer is option (C)

Note: The ovule is defined as an organ that develops into the seed after fertilization. The ovule is the part where reproductive cells are developed and contained. After fertilization the ovule starts to swell and its wall toughens up and prepares itself to become a seed. Ovule that has its integuments is Megasporangium.