. What would happen if your immune system attacked your own antigens?

I’m doing some practice exam questions for biology, and i’m not sure how to do these 3 parts to the question.

In which terrestrial biome can you find trees that produce cones instead of flowers and needles instead of leaves? have trees that produce cones instead of flowers and needles instead of leaves. the latitudes in this biome have evenly distributed precipitation throughout the year. is it high or low

In meiosis ii during anaphase ii which structures separated homologous chromosomes or sister chromatids