Botany

To solve the problem, we need to understand what double fertilization is and which group of plants it is characteristic of.

1. What is Double Fertilization?

- Double fertilization is a special process in plant reproduction.
- In this process, two male gametes (sperm cells) fertilize cells in the female gametophyte.
- One sperm fertilizes the egg cell to form a zygote (which becomes the embryo).
- The other sperm fertilizes two polar nuclei to form the endosperm, which nourishes the developing embryo.

2. Which Plants Show Double Fertilization?

- Double fertilization is unique to angiosperms, also called flowering plants.
- Angiosperms include plants like roses, mangoes, grasses, and many more.
- This process helps angiosperms efficiently develop seeds with stored food.

3. Other Plant Groups:

- Gymnosperms (like pine trees) do not have double fertilization.
- Lower plants like ferns and mosses also do not show this feature.

Final Answer:

Double fertilization is a characteristic feature of angiosperms (flowering plants).