Answer:
All living organisms share several key characteristics or functions: order, sensitivity or response to the environment, reproduction, growth and development, regulation, homeostasis, and energy processing. When viewed together, these characteristics serve to define life.
Explanation:
The answer is a hypothesis .... i think
This statement is false. Energy is definitely not 'always' required to force molecules to move from areas of high concentration to areas of low concentration. Energy is a property of objects in which produced and converted, that can be very useful to everyone's life.
Answer:
Arousal theory
Explanation:
Arousal theory is a theory of motivation and according to this theory people are motivated to perform actions because they want to maintain an optimum level of physiological arousal. There is a unique arousal level for each person. When the arousal level drops below this level, the person seeks for some sort of stimulation in order to elevate it up to the optimum level.
The same is the case of Juan in the question. Sky diving gives him a unique level of arousal and for maintaining it he practices the diving even he is tired after a long day of work.
The mass number of an element is the sum of the protons and neutrons. The number of neutrons for a given element is the only number that can change and still have the identity of the element stay the same, (because the atomic number is the number of protons). In this case the mass number would be 11