Examlex
Use the graph to estimate the vertex and determine whether it is a maximum or minimum point.
Express
To convey a thought or feeling through words, gestures, or actions.
Neural Tube
An embryonic structure that develops into the brain and spinal cord of an organism during early pregnancy.
Primitive Streak
An early sign of development in the embryo, marking the beginning of gastrulation and establishing the future axis of the body.
Embryo
The name for a developing human organism from about the third week through the eighth week after conception.
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