At What Stage of Pregnancy Does an Embryo Show a Beating

question 57

Multiple Choice

At what stage of pregnancy does an embryo show a beating heart and a complete central nervous system?

• A)8 weeks
• B)12 weeks
• C)20 weeks
• D)29 weeks

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Definitions:

Debris Slide

A rapid, downward movement of rock and soil debris on a slope.

Rotational Slide

A type of landslide characterized by the rotational movement of rock or soil along a concave-upward surface.

Debris Flow

A rapid flow of water mixed with soil, rocks, and other debris down a slope, often triggered by heavy rain or snowmelt.

Rock Avalanche

A rapid, large-volume descent of rock debris and soil on a mountain slope, often triggered by seismic activity, rainfall, or melting snow.