Question

The megasporophyll of gymnosperms is homologous to which structure of angiosperms
a. stamen
b. carpel
c. sepal
d. petal

Answer 1

Hint: In angiosperms, the stamen is described as a male reproductive part. It consists of two parts, anther, and filament. The anther produces microsporangia or pollen grains. On the other side, the pistil or carpel is described as a female reproductive part. It consists of three parts, stigma, style, and ovary. The ovary contains megasporangia or an egg.

Complete answer:
The megasporophyll of gymnosperms bears megasporangia, a female gamete. On the contrary, in angiosperms or seed plants, the female gametophyte is produced in the megasporangium. Moreover, fertilization and embryo formation also occur there. Therefore, the megasporophyll in angiosperms is rolled to produce a carpel.

The megasporophyll is a sporophyte that contains megasporangium in gymnosperms. On the other side, the carpel is the female reproductive organs in flowers. The male reproductive organ is known as stamen which is composed of anther and filament. It produces male gamete or pollen grain.

Hence, the correct answer is option (B).

Additional information:
The gymnosperms are reproduced through their exposed seeds or ovule. The seeds of gymnosperms are naked and are present on the female cones. They are not enclosed in an ovary. On the contrary, the angiosperms contain the female gametophyte in the ovule, which exists in an enclosed structure, the ovary. The fertilization takes place in the ovary.

Note: The gymnosperms and angiosperms plants are both seed-bearing and having few similarities. Angiosperms are known as flowering plants, whereas gymnosperms are known as non-flowering plants. The life cycle of angiosperms is seasonal, whereas the life cycle of gymnosperms are evergreen.