Какие признаки сходства и различия имеются в строении скелетов позвоночных животных?​

Consider the following reaction: 2h2 + o2 —> 2h2o a) what are the reactants in this reaction? b) what are the products in this reaction? c) how many molecules of oxygen are used in this reaction?

1)some people believe that certain drugs such as marijuana should be legalized. do you agree or disagree? 2)what impact might legalization have on forensic science as a field? which drug presents the greatest challenges to forensic science? why?

Organic molecules are sometimes found within meteorites that crash into earth. which meteorite characteristic is similar to what most likely was present on early earth?