Que es un ecosistema dar 3 ejemplos

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

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

What methods do scientists use to predict volcanic eruptions? select all that apply