9. How do we know the earth isn't uniform throughout?

Because the Earth is not a static, dead rock. It’s a vibrant, geologically active rock. There are volcanoes reshaping the surface, tectonic plates, glaciation, desertification, areas of subduction and other areas that are being pushed up, all because the surface of the planet is in constant motion, because all the stuff *under* the surface of the planet is also constantly in motion.

the food storage products of chrysophytes are oils or the polysaccharide laminarin.   formerly classified as plants, the chrysophytes contain the photosynthetic pigments chlorophyll a and c all but the yellow-green algae also contain the carotenoid pigment fucoxanthin.