From the producer level to which level does energy flow directly

Categorize each term as something that is typical of a scientific theory, a scientific hypothesis, or both. makes predictions

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.

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