What controls the characteristics of a organism?

Blood cells bring oxygen to cells and take carbon dioxide away. true or false

A5-year-old boy suddenly begins coughing while eating peanuts. he is choking and gagging. when he is brought to the ed, but he is awake and is able to give his name. on physical examination, his vital signs are stable. on examination of the chest, inspiratory stridor and intercostal and suprasternal retractions are apparent. which of the following is the most appropriate initial step in management? - allow patient to clear foreign object by spontaneous coughing- clear oropharynx with multiple blind sweeps with finger- position patient and perform back blows- stand behind patient and perform abdominal thrusts- perform emergency tracheostomy and take to surgery

Megan is 16 years old and overweight. she loves junk food and chocolate. a 10 minute walk to school is her only exercise every day. which is the best method to megan lose weight