Which of the following should be given to students before they begin a laboratory experiment?

a. problems to practice the concepts in the experiment

b. guidelines for safe laboratory practices and policies

c. the manual for repairing the laboratory equipment

Which of the following is one of the four conditions necessary for natural selection to occur in a population? fewer organisms are born than the habitat can support mutation does not occur organisms have identical characteristics variation is inherited

According the inverse square law, doubling the distance from the source of the sound, a speaker, for example, will drop the sound 6 db each time. if you were standing in the back of an auditorium, 32 feet away from a speaker not using any amplification, would you be able to hear a speaker clearly? why or why not?

Agland that serves both the digestive and the endocrine systems is called