Identify one condition other than identical young plants that should be held constant during the experiment

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

Which is one example of a phenotypic change that is not genetic

What do isotopes of uranium have the same number of? what do they have a different number of? a) same number of protons; different number of electrons b) same number of protons; different number of neutrons c) same number of electrons; different number of protons d) same number of neutrons; different number of protons