How many factors should a well-designed experiment test at one time?

This organism is not capable of performing photosynthesis. (horseshoe crab) true false

The bacteria found in soil is usually harmful and measures are taken to remove any traces of microorganisms. true or false

Graded assignment lab report answer the questions below. which combinations of substances resulted in a chemical change? for each metal that participated in a chemical change, write the type of metal it is, based on your examination of the periodic table. were there any metallic compounds that did not react with either the acid or the base? write the type of metal, based on your examination of the periodic table. make a general statement about the reactivity of the metals in this experiment.