Applying bug repellent to prevent bug bites is an example of , while applying anti-itch cream to reduce the irritation of a bug bite is an example of .

Ablastocyst is a group of cells that forms after a human egg is fertilized. the blastocyst consists of two types of cells. some of these cells will become the placenta. what do the other cells develop into?

What substance acts to prevent sudden ph changes in bodily fluids?

Which genetic disorders, caused by an extra x chromosome (xxy), is characterized by a lack of testicular development in males, effeminate features, possible mental impairment, and a thin stature?