which type of disease produces symptoms for which no physiological or anatomical cause can be identified?

The rapid decomposition of organic matter produces evidence which supports: the slow accumulation of coal deposits long ages of the earth rapid burial of vast amounts of vegetation biblical account of noah's flood

Consider the venn diagram of plant reproduction. where in this image, areas a - d, would you insert the picture of the orange lily?

Which of the following does not make up ground substance of connective tissue? hyaluronic acid elastic fibers glycosaminoglycan proteoglycan