Which of these is the BEST indication of the relative age of a rock layer? the position of the layer compared to other layers o the distance the layer extends over the Earth o the chemical make-up of the layer O the thickness of the layer

Astudent poured a solution of bromothymol blue indicator into three test tubes. then he placed an aquatic plant in two of the test tubes, as shown below. he placed a stopper on each test tube and placed them all in the dark for 24 hours. bromothymol blue turns from blue to yellow in the presence of co2

Which material is commonly used as a culture medium for living cells

Explain why scientists use the word dominant for certain traits.