Can some one , tell me what is this we use it in lab ,

The function of the excretory system is to control homeostasis and

In which area of the neuron is an action potential initially generated?

Which one of the following is true of trnas? a) trnas are double-stranded. b) each trna binds a particular amino acid. c) there are four types of trna. d) trnas carry special sequences known as codons. e) all of the above