Which of the following is a characteristic of attention deficit/hyperactivity disorder (AD/HD)? 1. has difficulty waiting for his or her turn
2. lacks facial expression
3. is unusually sensitive to light, sound, and touch
4. performs repetitive movements, such as spinning, rocking, or hand-flapping

Indica el nombre y la fucion de los vasos sanguineos que entran y salen de los riñones

Which of the following is the best definition of aerobic respiration? o a. the cellular process that releases energy by breaking down glucose o b. physical activity that involves the repeated motion of large muscle groups o c. physical activity that increases heart rate and breathing rate o d. the cellular process that converts solar energy to chemical energy

Some plants release toxic chemicals that kill or harm nearby plants. what type of example is this? 1 cooperation 2.mutualism 3.competition or 4.parasitism