A __ is the characteristic or appearance of the organism

How does the study of genetic disorders such as pku biologists understand normal alleles?

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?