How does the son play a major role in the
ecosistem?

The sun plays a critical role in the ecosystem. It provides the energy for all life on Earth and thus all Earth's ecosystems. Plants convert sunlight to make their own food, which they use to support their own lives.

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

there’s no image attached but i can if you want: )