Examlex
HIV attaches to T cell and macrophages by means of an interaction between gp120 and a(n)(antibody/CD4/gp41)receptor.
First Primates
The earliest members of the primate lineage, believed to have appeared in the Paleocene era, characterized by traits such as forward-facing eyes and grasping hands.
Fossil Evidence
Physical remnants of organisms, such as bones, shells, or leaves, preserved in rock, providing insight into the history of life on Earth.
Opposable Thumb
The arrangement of the fingers so that they are positioned opposite the thumb, enabling the organism to grasp objects.
Foramen Magnum
The opening in the vertebrate skull through which the spinal cord passes.
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