Examlex
According to Hess's model, ocean crust is made at mid ocean ridges and carried like a conveyer belt across the ocean basins to be recycled back down deep ocean trenches.
Blood Groups
Categories into which human blood can be divided, based on the presence or absence of certain antigens; includes A, B, AB, and O blood types.
Cline
A gradual change in certain characteristics exhibited by members of a species over a geographical area.
Hormone-disrupting Chemicals
Substances that interfere with the normal functioning of the endocrine system, potentially causing developmental, reproductive, neurological, and immune problems.
Human Health
Overall state of physical, mental, and social well-being for individuals or populations, not merely the absence of disease.
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