What is the most accessible form of carbon in the environment ​

Acommon kind of mechanical weathering is called

Ascience research group is testing a new type of plant food. one trial is conducted in a controlled experiment. the data from the trial show that the plant that received the new food grew faster than the control plant. the group announces that the new plant food makes plants grow faster. what is the main weakness in this scientific claim?

Which is the best example of plant tissue? the answer is d (just took the test)