An environmental group claims that a local chemical plant is polluting a nearby river. they are calling for a shutdown of the chemical plant. what evidence would you the most in evaluating their claim

Ivan is looking at a cross section of a stem taken from a vascular plant. he sees two different types of vascular tissue: the xylem, which is closer to the center of the stem, and the phloem, located around the xylem, closer to the outside of the stem. how do these two structures work together in a living plant?

What happens during the experiment stage of the scientific method

Suppose you are provided with an actively dividing culture of e. coli bacteria to which radioactive thymine has been added. what would happen if a cell replicates once in the presence of this radioactive base?