An ecosystem contains biotic and abiotic factors. Which of the following would be
an abiotic factor?
A. a microorganism on an animal
B. fungi growing on a tree
C. nutrients in the soil

In which of the following relationships is one organism always benefited while the other organism is always harmed

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

True or false multiple lane changes must be done individually going through the same procedures for each lane change