In 1910 Paul Ehrlich announced that Salvarsan was an effective treatment for this disease
Crocodilians are the only reptiles in which this organ has 4 separated chambers
A bird's crop is an expanded area of this part of the alimentary canal between the pharynx & stomach
It's the more common name for sodium chloride
After the sun & moon, this planet is the brightest object in the sky
In geometry it's a quadrilateral with 2 parallel sides; in anatomy, it's the smallest wrist bone
The pH in pH scale stands for the "potential of " this element
Foxglove is an example of this type of plant that completes its life cycle in 2 years
g. Acceleration due to this, varies slightly with latitude since the Earth is not a perfect sphere
Titan, a moon of this planet, has a thicker atmosphere than Earth