Air has a density of 0.001293 g/cm³. which of these gases would make a balloon float in air? check all that apply.

*nitrogen, density: 0.001251 g/cm³
*carbon monoxide, density: 0.001977 g/cm³
*helium, density: 0.000178 g/cm³
*carbon dioxide, density: 0.001977 g/cm³
*hydrogen, density: 0.9 g/cm³
*oxygen, density: 0.001429 g/cm³

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products

the missing space is phylum

cell division is not regulated in tumor cells.

what in the weirdo : o