Me and my students are looking for information about salt stress in growin plants! We want to desing an experiment to kown how diferents salt concentration afects them. have you done? do you know which seeds are the best?

About the action of muscles in contact with lactic acid,to what extend do the muscles react when there ìs no supply of oxygen?

Does anyone know of any (the names) microbes in dirty water??

How Complex of cells in the brain can think ,if it is correlated with any of the undefined Envioronmental factors??

French scientist Payen and Persoz have a experiment which helped them found amylase,can someone tell me how they did it.

why are the sky is blue?

I am helping an IB student making his extended essay in Biology. He wants to prove that a certain population in my country matches better the Hardy Weinberg model than other. The problem he has is that he does not know how to proceed to take the samples in order to get to know the genotypic frequencies. How many individuals should be enough to get a good sample?
In order to determine if the populations are in Hardy Weinberg equilibrium should he sample both the parental generation and the daughter generation or just one of them? I have seen examples of problems in which you just need to know the genotypic frequency of one generation and from there you can infer if the population is at equilibrium. Can you explain to me that case?