What type of rna retrieves the appropriate amino acid from the pool to add to the protein chain?.

your body is trying to warm itself up. or more precisely, sensors in your skin send messages to your brain to generate heat to your body.

those characteristics are cellular organization, reproduction, metabolism, homeostasis, heredity, response to stimuli, growth and development, and adaptation through evolution. some things, such as a virus, demonstrate only a few of these characteristics and are, therefore, not alive