Psychology is the of behavior and mental processes. a. social b. medical c. scentific d. clincal

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 element is able to combine with itself and hydrogen to form large molecules ?

Several billion years ago which gas was the least prevailant in the atmosphere