Megasporangium is equivalent to
- Ovule
- Embryo sac
- Fruit
- Nucellus
The Correct Option is A
Solution and Explanation
Megasporangium is equivalent to the ovule. It is a structure that produces megaspores which further gives rise to the female gametophyte in plants. A megasporangium consists of a nucellus and an integument. Nucellus is the inner part of the megasporangium or ovule.
Megasporangium is connected to the placenta by a stalk called funicle. The outer layer that covers a megasporangium or ovule is called integument. Integument surrounds the nucellus. The point at the tip where integument is absent, is called micropyle. Opposite to the micropyle is the chalaza end that forms the basal part of the ovule. Embryo sac lies inside the nucellus. A functional megaspore develops into a female gametophyte.
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Concepts Used:
Pre-fertilization events - Monoecious Plant
Fertilization in plants may be a process during which they undergo amphimixis in consequence of pollination and germination. During a physicochemical process, the male gametes (known as pollen) infusion with the feminine gametes (known as ovum) forms diploid zygote after carpal pollinates. The whole process happens in a zygote which later germinates into a seed. During the method, what happens is male gametes are transferred into female reproductive organs through pollinators (butterflies, birds, honey bees, bats, and flower beetles). This leads to an embryo being formed during a seed. Flowers are the reproductive organs of angiosperms and reproduce in a completely different method.
Read More: Flower Structure
The two important pre-fertilization procedures are gametogenesis and gamete transfer. The female and male reproductive forms in flowers are the androecium and the gynoecium which distinguishes and goes through development.
"Mono" means single so a monoecious plant is one that bears both male and female sex organs on same plant. The monoecious plant can produce bisexual flowers or unisexual flowers. A dioecious plant is one that bears both male and female sex organs on different plants.
Read Further: Sexual Reproduction in Flowering Plants