Select the correct answer from each drop-down menu.
the method of collecting data that involves response variables is the
are drawn by comparing the data collected from two groups without regulating is the
method, and the method in which conclusions
method.

Ineed to find the answer of this question because i dont understand it

Why do cells appear different in distilled water than they do in 10% salt water?

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)