Drew added yeast and sugar to lukewarm water and placed it in a flask. He stretched a ballon over the opening of the flask. After several minutes, he noticed small bubbles rising along the sideb of the flask as the ballon slowly began to inflate. Drew concluded that

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.

the tricuspid valve is present between right atrium and right ventricle

you can have just about every answer you can think of