Hormones can be transported in blood in dissolved form or bound to a transport protein or serum carrier.
Pie chart, I'm pretty sure
Crude density and ecological density are both related but different. Ecological density is the portion of land that a certain species can colonize, where as crude density is the land within the organism's range.
It can't dissolve any more solute.
Both joints are ball and socket joints, but the hip is much more mechanically constrained. There are other bones and muscles that get in the way of the mobility of the hip joint. This is partly because stability is more important in the hip joint due to its weight bearing function